discovered in 1850 and is one of the longest underwater caves in Texas.
Its unique coloring and caving system is a "result of slightly acidic rainfall interacting with and
eroding the limestone over millennia," which translates to seriously pretty water and way-cool diving experiences.
But, like any sort of cliff-diving, swimming here can get tricky -- especially with no lifeguards on duty. Jumpers must be extra cautious when leaping from the rocks (signs say not to jump, but that doesn't stop most folk).
The best way to avoid any issues is to stay away from swimming deep within the caves.
Here are some people far braver than us taking the plunge: Click here to view more images