#urdatx santa grazi
The super impressive La Verna cave in Urdatx-Santa Grazi (Zuberoa), which we’re willing to visit one day as it’s the biggest visitable cave chamber being 194m high, 245m wide, and having 3.6M m2 of cubic space!!! It’s ranked the 22nd biggest chamber in the whole world.
It’s so big in fact that in 2003 a balloon with 4 passengers got to successfully fly insidethe cave:
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