Pozo Azul

Useful Information

Location:	Covanera, Burgos. 90 km south of Santander.
Open:
Fee:
Classification:	Karst cave
Dimension:	T=11 °C (water)
Guided tours:
Photography:
Accessibility:
Bibliography:
Address:
As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then. Please check rates and details directly with the companies in question if you need more recent info.

History

NOV-1964	exploration of the first 100 m by Joaquín Plana from G.E.Edelweiss.
1979	first sump crossed the first time by two divers from the G.E. Standard (STD) from Madrid.
1981	second sump reached after the exploration of the subaerial section.
1983	383 m of sump 2 reached by G.E. Standard.
1989	G.E.Gaia advances to 650 m.
SEP-2002	sump 2 extended to 1,950 m and a depth of -60 m by Jason Mallinson.
MAY-2004	sump 2 extended to 2,220 m and a depth of -70 m by Jason Mallinson.

Description

Pozo Azul (Blue Pot) is a deep blue karst spring, as the name suggests. It is much visited by tourists. The cave behind the spring is filled with water and only accessible to cave divers.

The water of the spring emerges from a huge cave, starting with a 700 m sump. After a 300 m swim, a cascade, and a short stream passage a second sump is reached. This second sump is known for 2,220 m and a depth of -70 m and is the longest sump in Spain.