Locations in the table below are usually at a point closest to the
site where a GPS fix was possible; this point is sometimes ten or
more metres from the site.  Locations are sorted West→East.  Click
on a coordinate to see that coordinate on Google Maps.
| T | Coordinates | Site | 
| C | N43°20'14" W5°54'29" 30T 264.28 4802.37
 
 | Cueva de las Caldas | 
| S | N43°17'56" W5°55'40" 30T 262.51 4798.16
 
 | Sumidoiru (La Mortera) | 
| S | N43°30'32" W5°29'36" 30T 298.56 4820.56
 
 | El Sumidoriu sink | 
| C | N43°13'15" W5°26'49" 30T 301.38 4788.45
 
 | Tarna Hydroelectric plant cave | 
| C | N43°10'41" W5°21'41" 30T 308.19 4783.50
 
 | Devoyu resurgence | 
| C | N43°10'41" W5°21'27" 30T 308.51 4783.49
 
 | Devoyu sink | 
| C | N43°26'47" W5°11'49" 30T 322.35 4812.93
 
 | Cueva del Sumidero/Agua | 
| C | N43°27'24" W5°06'23" 30T 329.70 4813.88
 
 | Cueva de les Pedroses | 
| C | N43°27'23" W5°06'22" 30T 329.71 4813.85
 
 | Cueva de les Pedroses sink (cave?) | 
| C | N43°20'12" W5°06'04" 30T 329.79 4800.55
 
 | Cueva La Huelga | 
| C | N43°26'12" W5°04'27" 30T 332.25 4811.62
 
 | Cuevona North Entrance | 
| C | N43°26'03" W5°04'20" 30T 332.39 4811.32
 
 | Cuevona South Entrance | 
| C | N43°27'39" W5°04'08" 30T 332.75 4814.28
 
 | Cueva del Tenis | 
| C | N43°27'39" W5°04'06" 30T 332.68 4814.07
 
 | Cueva del Tenis exit | 
| C | N43°18'29" W5°03'20" 30T 333.40 4797.28
 
 | Santa Cueva, in Covadonga | 
| C | N43°18'00" W5°03'14" 30T 333.51 4796.39
 
 | Cueva Orandi | 
| R | N43°18'13" W5°03'01" 30T 333.82 4796.78
 
 | Gueyu Reinazo resurgence | 
| P | N43°25'22" W5°02'53" 30T 334.32 4810.01
 
 | Santianes Molín de Arriba | 
| C | N43°17'55" W5°02'43" 30T 334.10 4796.01
 
 | Pozo Jaciosu (Trumbio lower entrance) | 
| C | N43°17'57" W5°02'42" 30T 334.13 4796.08
 
 | Small cave, near Trumbio lower entrance | 
| K | N43°17'56" W5°02'40" 30T 334.17 4796.03
 
 | Trumbio lower entrance (est. from survey) | 
| C | N43°25'46" W5°02'15" 30T 335.20 4810.73
 
 | Tinganón | 
| K | N43°23'56" W5°02'05" 30T 335.34 4807.33
 
 | La Mujerina area big depression † | 
| K | N43°25'28" W5°01'58" 30T 335.56 4810.17
 
 | ‘Tinganón feeder’ (337m) | 
| C | N43°17'43" W5°01'56" 30T 335.26 4795.82
 
 | Trumbio | 
| P | N43°26'02" W5°01'08" 30T 336.71 4811.19
 
 | The ‘Polígono hole’, 250m above Polígono Guadamia | 
| P | N43°26'12" W5°00'59" 30T 336.91 4811.49
 
 | Below possible Cueva Negra old resurgence | 
| C | N43°25'21" W5°00'27" 30T 337.60 4809.90
 
 | Cueva Negra (455m) | 
| R | N43°26'02" W5°00'18" 30T 337.84 4811.16
 
 | Madre del Río | 
| K | N43°27'31" W4°59'26" 30T 338.97 4813.66
 
 | Pozu Tuerba  + Sea Arch | 
| B | N43°16'19" W4°58'57" 30T 339.22 4793.13
 
 | Lago Ercina Bar María Rosa | 
| P | N43°16'18" W4°58'57" 30T 339.23 4793.10
 
 | Lago Ercina carpark | 
| K | N43°15'36" W4°58'44" 30T 339.49 4791.80
 
 | Forcau route possible caves at +1235m | 
| C | N43°15'27" W4°58'28" 30T 339.85 4791.51
 
 | Forcau route vertical cave at +1306m | 
| K | N43°16'51" W4°58'43" 30T 339.57 4794.11
 
 | Lago Ercina cow-shelters | 
| K | N43°27'40" W4°58'24" 30T 340.46 4814.11
 
 | Pozo de las Grallas, Bufones de Pría (41m) | 
| P | N43°14'57" W4°57'59" 30T 340.47 4790.57
 
 | Forcau col | 
| C | N43°14'52" W4°58'03" 30T 340.39 4790.42
 
 | Pozu de Vega El Forcau, +1480m, reconfirmed 2011 | 
| S | N43°24'52" W4°57'55" 30T 341.00 4808.94
 
 | Llamigo sink | 
| C | N43°19'32" W4°57'27" 30T 341.40 4799.05
 
 | El Peruyal, near Benia – shown on the map as Cueva Pruneda | 
| K | N43°19'52" W4°56'39" 30T 342.49 4799.64
 
 | Avín depression | 
| S | N43°21'53" W4°56'38" 30T 342.59 4803.37
 
 | Vega de Hibeo sink | 
| P | N43°19'13" W4°55'07" 30T 344.42 4798.17
 
 | Minas de Alda | 
| C | N43°19'31" W4°55'07" 30T 344.55 4798.93
 
 | Cueva Tayada (Cueva Alda), 450m? | 
| C | N43°21'38" W4°54'53" 30T 344.96 4802.85
 
 | “Cueva Geoffo” (Cosagra), 190m | 
| S | N43°24'53" W4°54'43" 30T 345.32 4808.85
 
 | Vizcaina/L’Acebal sink, 119m? | 
| K | N43°24'43" W4°54'31" 30T 345.47 4808.32
 
 | Jou de Cuanda | 
| P | N43°24'44" W4°54'22" 30T 345.67 4808.35
 
 | Collado los Cuervos | 
| C | N43°20'03" W4°54'12" 30T 345.81 4799.89
 
 | Cueva Dobros (Depression N of Ortiguero) | 
| B | N43°26'33" W4°54'16" 30T 346.00 4811.93
 
 | Bar La Cueva, Villahormes | 
| R | N43°12'47" W4°54'09" 30T 345.57 4786.44
 
 | Resurgences at Caín, 473m? | 
| P | N43°24'37" W4°54'10" 30T 346.05 4808.34
 
 | Rales System car parking for Molino | 
| K | N43°23'14" W4°53'50" 30T 346.43 4805.78
 
 | Rotella large depression cave | 
| P | N43°24'40" W4°53'45" 30T 346.60 4808.43
 
 | Saddle between Rales and Fuentica | 
| C | N43°24'39" W4°53'44" 30T 346.64 4808.39
 
 | Rales System | 
| K | N43°26'51" W4°53'10" 30T 347.50 4812.46
 
 | Playa Gulpiyuri | 
| C | N43°19'04" W4°52'30" 30T 348.07 4798.02
 
 | Flea cave, +287m | 
| C | N43°22'44" W4°51'58" 30T 348.94 4804.80
 
 | Caldueñín, 140 m | 
| P | N43°20'57" W4°51'26" 30T 349.59 4801.47
 
 | Tebrandi trailhead, ~770m | 
| C | N43°22'44" W4°51'20" 30T 349.79 4804.77
 
 | Pozo de Fresno » | 
| P | N43°23'00" W4°51'11" 30T 350.01 4805.26
 
 | El Mazuco, Ermita del Santo Ángel (confirmed ±0.5″ over several years and devices) | 
| P | N43°22'42" W4°51'05" 30T 350.12 4804.70
 
 | ‘Car paddock’ parking for Boriza/Fresno | 
| C | N43°22'48" W4°50'59" 30T 350.17 4804.67
 
 | Cueva de Bolugo | 
| R | N43°24'43" W4°50'54" 30T 350.46 4808.43
 
 | Resurgence below Green Sink | 
| P | N43°22'40" W4°50'35" 30T 350.80 4804.64
 
 | Old resurgence? above Boriza | 
| P | N43°22'39" W4°50'35" 30T 350.80 4804.58
 
 | Hole next to track immediately above Boriza | 
| P | N43°22'38" W4°50'35" 30T 350.81 4804.56
 
 | Boriza (track above and to S.) | 
| R | N43°22'43" W4°50'36" 30T 350.68 4804.50
 
 | Boriza resurgences 2019 | 
| S | N43°22'40" W4°50'27" 30T 350.99 4804.62
 
 | Flood sink above Boriza | 
| K | N43°22'38" W4°50'20" 30T 351.13 4804.56
 
 | Boriza stream audible through rocks | 
| C | N43°23'56" W4°50'18" 30T 351.24 4806.96
 
 | Green Sink cave (above and to S. of sink) | 
| R | N43°22'29" W4°50'02" 30T 351.54 4804.27
 
 | Ojo del Río Bolugas | 
| C | N43°22'31" W4°49'58" 30T 351.64 4804.35
 
 | Cueva a Sul | 
| C | N43°22'25" W4°49'58" 30T 351.63 4804.14
 
 | Cueva de Collau Rubiera | 
| P | N43°22'51" W4°49'38" 30T 352.10 4804.94
 
 | End of the road S. of Alto de la Tornería | 
| P | N43°22'44" W4°49'22" 30T 352.46 4804.73
 
 | Rafa’s Cabaña | 
| R | N43°22'14" W4°47'40" 30T 354.73 4803.74
 
 | Spring at west end of Viango | 
| C | N43°22'10" W4°47'12" 30T 355.36 4803.60
 
 | Cueva de la Yosa del Viango | 
| P | N43°10'07" W4°47'09" 30T 354.95 4781.29
 
 | Refugio de Áliva (1666m) | 
| K | N43°22'28" W4°46'41" 30T 356.06 4804.14
 
 | Dry stream valley, NE Viango | 
| K | N43°12'16" W4°46'27" 30T 355.98 4785.25
 
 | ‘Cow shelter’ caves, nr. road to Áliva | 
| B | N43°24'05" W4°46'20" 30T 356.60 4807.12
 
 | Bar La Roxia at La Pareda | 
| C | N43°24'00" W4°45'56" 30T 357.14 4806.96
 
 | Cueva Bolado (Herrería) | 
| K | N43°14'24" W4°44'16" 30T 358.91 4788.95
 
 | Arch/shelter near Sotres TV mast | 
| K | N43°14'22" W4°44'14" 30T 358.96 4788.87
 
 | Arch near Sotres TV mast – reckoned from photo bearings | 
| P | N43°14'14" W4°44'10" 30T 359.03 4788.63
 
 | Sotres telecoms mast | 
| C | N43°22'22" W4°44'13" 30T 359.39 4803.89
 
 | Fuente Grande, near Viango | 
| S | N43°14'06" W4°43'27" 30T 360.11 4788.56
 
 | Sink 3km E of Sotres (1277m?) | 
| C | N43°14'09" W4°43'25" 30T 360.16 4788.65
 
 | Shaft 3km E of Sotres (1276m?) | 
| C | N43°24'54" W4°43'16" 30T 360.66 4808.33
 
 | Bufones de Ballota – sea cave with stream entering | 
| C | N43°22'35" W4°43'18" 30T 360.64 4804.26
 
 | El Cuevón de Pruneda (Purón cave) | 
| K | N43°22'07" W4°42'53" 30T 361.18 4803.39
 
 | Holly depression above Las Conchas | 
| K | N43°14'21" W4°42'45" 30T 361.07 4789.01
 
 | Sotres crossroads depression | 
| C | N43°15'16" W4°42'14" 30T 361.81 4790.69
 
 | Cueva de la Marniosa | 
| R | N43°22'18" W4°41'49" 30T 362.64 4803.68
 
 | Nacimiento de Río Purón | 
| R | N43°15'19" W4°41'47" 30T 362.41 4790.77
 
 | Cabezas de Vaca – Valle de Sobra resurgence and cheese cave (849m?) | 
| C | N43°15'19" W4°41'44" 30T 362.48 4790.77
 
 | Valle de Sobra abandoned cheese cave (15m E) | 
| C | N43°14'47" W4°40'29" 30T 364.15 4789.75
 
 | Cueva del Nacimiento/Agua | 
| P | N43°19'39" W4°40'22" 30T 364.49 4798.74
 
 | ‘Cobalt’ mines, Río Cares | 
| C | N43°16'27" W4°40'19" 30T 364.44 4792.83
 
 | Cueva de Los Jarres, San Esteban † | 
| K | N43°21'44" W4°40'03" 30T 364.99 4802.60
 
 | La Borbolla top depression | 
| K | N43°21'46" W4°39'58" 30T 365.11 4802.66
 
 | La Borbolla middle depression (El Jorcón) | 
| K | N43°21'47" W4°39'12" 30T 366.14 4802.67
 
 | La Borbolla lower depression | 
| C | N43°19'57" W4°38'46" 30T 366.65 4799.26
 
 | Cueva Llonín | 
| C | N43°14'21" W4°38'37" 30T 366.65 4788.90
 
 | Cueva la Sotorraña (as shown on survey/board) | 
| C | N43°23'39" W4°38'33" 30T 367.09 4806.11
 
 | Pendules shelters | 
| P | N43°14'49" W4°38'29" 30T 366.86 4789.75
 
 | Bejes Puente Pumpedrei #1 | 
| P | N43°14'47" W4°38'31" 30T 366.82 4789.68
 
 | Bejes Puente Pumpedrei #2 | 
| C | N43°16'28" W4°38'06" 30T 367.44 4792.80
 
 | Pozo del Infierno (310m) † | 
| P | N43°21'56" W4°38'05" 30T 367.66 4802.92
 
 | La Borbolla village † | 
| R | N43°21'50" W4°38'02" 30T 367.73 4802.73
 
 | La Borbolla resurgence | 
| C | N43°16'02" W4°38'01" 30T 367.54 4791.98
 
 | Urdón cave (estimate; GPS impossible) | 
| C | N43°23'42" W4°36'37" 30T 369.71 4806.16
 
 | Cobijeru 2 muddy cave | 
| C | N43°23'41" W4°36'36" 30T 369.72 4806.10
 
 | Cobijeru 1 resurgence | 
| C | N43°23'47" W4°36'35" 30T 369.76 4806.29
 
 | Cobijeru 3 – sea cave | 
| R | N43°18'35" W4°36'31" 30T 369.66 4796.68
 
 | Vauclusian spring (Deva gorge, between Estragüeña and Puentelles) | 
| R | N43°15'09" W4°36'30" 30T 369.55 4790.32
 
 | La Hermida hot spring | 
| R | N43°17'59" W4°36'24" 30T 369.79 4795.56
 
 | Fuente de Estragüeña, 110m | 
| C | N43°23'23" W4°34'50" 30T 372.00 4805.30
 
 | Cueva Mazacuíos, La Franca | 
| C | N43°18'06" W4°35'39" 30T 370.81 4795.76
 
 | Goat Cave through trip | 
| C | N43°18'06" W4°35'37" 30T 370.84 4795.77
 
 | Crow Cave with pitch | 
| K | N43°18'04" W4°35'36" 30T 370.88 4795.71
 
 | “El Arco” | 
| C | N43°18'03" W4°35'35" 30T 370.88 4795.67
 
 | Cueva del Arco (480m) | 
| C | N43°12'17" W4°35'36" 30T 370.66 4785.00
 
 | Cueva de Fair Share (BUSS 1973; 215m) | 
| P | N43°18'15" W4°35'39" 30T 370.71 4795.83
 
 | ‘The barn’ near Suarías, near Al Arco | 
| S | N43°18'14" W4°35'31" 30T 370.88 4795.81
 
 | Sink with boulders near Al Arco barn, Suarías | 
| R | N43°19'10" W4°35'19" 30T 371.19 4797.53
 
 | Likely resurgence for Suarías Cueva La Redonda | 
| C | N43°18'50" W4°35'15" 30T 371.37 4797.10
 
 | Cueva La Redonda (Suarías) (161m) | 
| S | N43°18'01" W4°34'53" 30T 371.84 4795.59
 
 | Sink in boulders in big depression above Suarías (Corvera) | 
| K | N43°20'59" W4°34'46" 30T 372.10 4801.07
 
 | Andinas westernmost (highest) depression | 
| K | N43°14'08" W4°34'31" 30T 372.21 4788.39
 
 | Riega de Cicera ‘pothole in the wall’ | 
| R | N43°17'54" W4°34'22" 30T 372.53 4795.37
 
 | Suarías Corvera resurgence | 
| C | N43°18'08" W4°34'18" 30T 372.63 4795.78
 
 | Cabañuca, 305m | 
| R | N43°18'20" W4°34'16" 30T 372.69 4796.15
 
 | Cabañuca resurgence, 208m? | 
| C | N43°19'53" W4°33'34" 30T 373.68 4799.01
 
 | Cueva La Loja | 
| P | N43°19'18" W4°33'14" 30T 374.10 4797.93
 
 | Track to 1973 cave(?), near Morodio (2015 ») | 
| S | N43°19'56" W4°33'30" 30T 373.78 4799.10
 
 | Andinas bottom sink | 
| K | N43°19'42" W4°31'16" 30T 376.78 4798.61
 
 | Canto Grande depressions, Cabanzón | 
| C | N43°19'04" W4°30'42" 30T 377.53 4797.44
 
 | Cueva de Casamaría (2015 ») | 
| P | N43°17'00" W4°30'23" 30T 377.88 4793.59
 
 | Saddle above Cororigo resurgence (2015 ») | 
| P | N43°20'12" W4°29'50" 30T 378.74 4799.49
 
 | Cofría resurgence rift parking (nr. Sobanejo) | 
| R | N43°20'22" W4°29'21" 30T 379.40 4799.81
 
 | Cofría resurgence rift 2009 & 2010 | 
| C | N43°18'27" W4°29'17" 30T 379.41 4796.24
 
 | Cueva Las Brujas (~170m) | 
| C | N43°20'25" W4°29'07" 30T 379.72 4799.87
 
 | Cofría sinks (Regato Mata del Tocial) | 
| S | N43°16'49" W4°29'13" 30T 379.46 4793.22
 
 | Cueva Toyu river sink | 
| K | N43°16'53" W4°29'13" 30T 379.47 4793.35
 
 | Cueva Toyu ‘nettle feature’ | 
| C | N43°16'55" W4°29'09" 30T 379.54 4793.41
 
 | Cueva Toyu NW ‘torca’ entrance | 
| P | N43°16'56" W4°29'08" 30T 379.57 4793.42
 
 | Cueva Toyu old barn NE corner (203m) | 
| C | N43°16'54" W4°29'04" 30T 379.66 4793.39
 
 | Cueva Toyu NE ‘Roza’ entrance | 
| C | N43°16'59" W4°29'03" 30T 379.70 4793.53
 
 | Cueva Rozada, near Cueva Toyu | 
| P | N43°16'55" W4°28'59" 30T 379.77 4793.41
 
 | Cueva Toyu resurgence | 
| C | N43°16'44" W4°28'58" 30T 379.79 4793.07
 
 | Cueva de los Marranos » | 
| C | N43°16'44" W4°28'57" 30T 379.82 4793.07
 
 | Cave 68 | 
| C | N43°23'47" W4°25'14" 30T 384.96 4805.81
 
 | Cueva del Cuélebre | 
| R | N43°15'27" W4°16'01" 30T 397.17 4790.19
 
 | La Fuentona, Ruente | 
| C | N43°20'29" W4°14'11" 30T 399.88 4799.68
 
 | Cobijón cave | 
| P | N43°20'27" W4°14'11" 30T 399.90 4799.62
 
 | Cobijón – river, close to cave | 
| S | N43°04'44" W4°14'09" 30T 399.52 4770.52
 
 | Sink at at Venta de Tajahierro | 
| K | N43°20'20" W4°12'46" 30T 401.81 4799.38
 
 | Bustablado depression cliff | 
| R | N43°11'34" W3°35'02" 30T 452.56 4782.38
 
 | Nacimiento del Gándara † | 
| C | N43°12'23" W3°34'21" 30T 453.50 4783.89
 
 | Torca del Mortero de Astrana † | 
| C | N43°14'02" W3°34'00" 30T 454.00 4786.95
 
 | Garma Ciega † | 
| K | N43°15'18" W3°33'12" 30T 455.09 4789.27
 
 | Hoyo Masallo † | 
| S | N43°20'36" W3°42'20" 30T 442.81 4799.18
 
 | El Coladillo sink (close to La Cavada, SSE of Solares) | 
| R | N43°15'05" W3°36'23" 30T 450.89 4789.12
 
 | Puente Cubera resurgence, Asón (~200m) | 
| C | N43°20'22" W3°22'09" 30T 470.18 4798.78
 
 | Cueva Los Tocinos | 
| C | N43°20'14" W3°21'55" 30T 470.49 4798.54
 
 | 10m SE of small cave above Hoya Mena sink | 
| S | N43°20'15" W3°21'54" 30T 470.51 4798.56
 
 | Hoya Mena sink | 
| S | N43°23'58" W3°21'31" 30T 471.08 4805.46
 
 | Hazas sink | 
| R | N43°23'47" W3°19'44" 30T 473.47 4805.11
 
 | Oriñón resurgence | 
| C | N43°21'41" W3°16'37" 30T 477.67 4801.20
 
 | Cubilla (192m) | 
| P | N43°21'45" W3°16'34" 30T 477.74 4801.32
 
 | Parking above Cubilla | 
| C | N43°21'34" W3°15'22" 30T 479.36 4800.97
 
 | Cueva Lastrilla (98m?) | 
| P | N43°21'37" W3°14'52" 30T 480.03 4801.06
 
 | Turn-off to Cueva Lastrilla | 
| P | N43°06'56" W2°40'05" 30T 527.12 4773.91
 
 | Parque Natural de Urkiola † | 
| C | N43°07'16" W2°43'31" 30T 522.46 4774.51
 
 | La Cueva de Balzola (308m) | 
| C | N42°59'25" W2°25'15" 30T 547.33 4760.11
 
 | Cueva Gesaltza |