Mortillano system
Mortillano system Location in Spain
Location	Cantabria, Spain
Coordinates	43°13′51″N 3°34′04″W / 43.2307405°N 3.5678092°W / 43.2307405; -3.5678092
Depth	950 m (3,120 ft)
Length	146.500 km (91.031 mi)
Discovery	1960
Geology	Limestone

The Mortillano system is the second longest^[1] karst system in Spain and one of the largest in Europe, the sixth, with 146.5 km of galleries.^[2] It is also the 15th longest cave system in the world.

History

Explorations of the system began in the 1960s and were resumed in the 1990s. Since then, more than 20 inlets and eight underground rivers with a large number of small tributaries have been found.^[2]

References

See also

• List of longest caves

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