Discover the inside of the planet!

Swim, float and submerge on underground rivers that nature has created under the Earth. Admire this ancient landscape and let go on an extraordinary experience.

  • Use of a life jacket is mandatory at all times.
  • Total swim of 437 yards (400 m).
  • Temperature of the water is 75 °F (24 °C).

You will find guidelines all over the river, designed to show you the way. There are also emergency exits every 109 yards (100 m) in case you need them.