The chasm is 103 meters deep, but it is not a karst failure in the usual sense. The cave was already inside the rock when the ceiling collapsed and a hole was formed. The cave was first mentioned in the 3rd century, and in the 15-16th centuries it was even inhabited.
Below everything looks like a rainforest.
First you go down in the elevator and then on foot and by boat.
Met an underground resident.
The second attraction of the cave is the underground river. The next photo also shows a huge stalactite.
The whole cave is quite large, 2 kilometers of routes are open for tourists.
There are several beautifully illuminated lakes, this is the farthest point of the route.
Getting there: parking N 44 51.448 E 1 45.062