The nature of genius in their works, sometimes it delights and fascinates. So, cave swallows, which is located in the tropics of central Mexico, attracted by a BASE jumper and cavers from around the world. Its size is impressive, the beauty of delights, identity fascinating. Cave swallows the 2 nd place in Mexico in depth, and 11 in the world. It falls to the Earth's interior to a depth of 376 meters, which is comparable with the height of the Empire State Building (381 m without a spire).