Standing on the edge of a never-ending black hole, this is one leap you wouldn't want to make.Jacob's Well in Wimberley, Texas is one of the most dangerous places to dive on Earth, having claimed the lives of more than eight divers. But that doesn't stop thrill-seekers from taking the plunge.This stunning natural swimming spot - and the daredevil swimmers who dive into it - was captured by amateur photographer Carl Griffin, 56.'Jacob's Well is a perpetual artesian spring that feeds Cypress Creek,' says Griffin, of Spring Branch, Texas.'When people look at the two boys making the leap, they do not see the water.'All they see is this huge hole, an abyss; the boys appear to be jumping into.'The water is that clear, that actually the boys are only about one meter above the water's surface.'Scuba divers love to explore the area despite its dangers.'Eight divers have lost their lives over the years, despite attempts by authorities to prevent divers from entering the cave system.'The mouth of the spring is four metres wide, with the depth of the water at approximately ten metres.The spring then angles down into one of the largest underwater caves in the state of Texas, reaching a depth of a massive forty metres.Carl explains: 'For those who aren't diving, this is a natural spring fed pool being that can be and is enjoyed by everyone.'Recent attempts at developing the surrounding area resulted in the creation of a natural preserve so that the springs could be enjoyed for generations to come, and I would definitely visit again!'(dailymail.co.uk)ANN.Az