Cueva de las Maravillas National Park

Approximately 800 meters below the ground lie the ancient las Maravillas caves, whose age is estimated to be somewhere around 100,000 years. The caves are now open to the public, and an option of taking the elevator back up exists for those not thrilled about the upwards climb. See stalactite and stalagmite formations, wall pictographs, and even local fauna (iguanas).