The Natural Bridge Caverns are home to the biggest commercial cave system in Texas. Above-ground adventures include zip lining, a rope course, a maze, gem mining, shopping and dining. But the ...

“The Sink funnels water from the 70 square miles that surround it into vast caverns of the Floridan Aquifer, making it a jaw-dropping diving site and a highway for contaminants,” WUFT-FM reported last ...