Introduction
Site list (GPS fixes) Walks (GPS tracks) Video clips Panoramas
Electronic projects:
Bat detector
Lamp tests
µ-controlled lamp
SEPIC-based lamp
ISP isolators
Making SMT boards
Expedition logs:
Spain 1973, 1974,
1975, 1976, 1977,
1979, 1982, 1983,
1985, 1986, 1987,
1988, 1989, 2000,
2001, 2002, 2003,
2004, 2005, 2006,
2007, 2008, 2009,
2010, 2011, 2012,
2013, 2014, 2015,
2016, 2017, 2018,
2019, 2020, 2021,
2022, 2023
Mexico
New England
Translation:
Name: Cueva Bolado (Las Herrerías, blacksmiths)
Location: 2.5km S of Llanes (3.5km by road). From the Llanes–La Pareda road, turn left about 0.6km after crossing the main N634 road. After 100m or so, some 100m before a quarry entrance, there is a widening in the track, with lake to east, to park. Go west over small stream (drain) and wooded path 50m to big walk-in cave entrance.
GPS: N43°24'00" W4°45'56"
UTM: 30T 357.14 4806.96
Map: Porrúa (32-III)
Survey: see artepaleoliticoenasturias.com/2014/01/04/las-herrerias/ »
Bolado/Herrerķa survey
Description: Easy walking cave with crystals, at the end. One side passage is gated off, presumably has paintings or other archaeological interest.
Visits:
2004 – locate entrance
2004 – general explore
2005 – more photographs, etc.
2010 – tourist trip, physical; + dark adjustment experiment
2011 – UV torch tests
2012 – test 3W LED lights and surveying reflectors
2019 – general explore and discovered stream and resurgence
2021 – general explore and torch tests
2022 – test NEO3 light; photos, etc.
2023 – test UV-C (255nm) 4W torch
Other:
Pictures:
Crystal flow in Bolado
Bolado - modern art
Cueva Bolado formations