Video: Inside the bottomless black hole in America

Jacob's well in Wimberley, Texas is one of the most dangerous places on earth to jump his head.

More than 8 people lost their lives when they jumped into this black hole but still did not prevent those who seek adventure to come down here.

This is a beautiful natural swimming spot and the jumps in the water have been recorded by amateur photographer Carl Griffin, 56 years old.

"Well Jacob is an eternal stream that supplies water to the Cypress Valley , " said Griffin in Spring Branch, Texas.