Three sinkholes filled with warm, crystal-clear water reached by a horse-driven cart on an old train track through the jungle.

At least seven hues of blue and turquoise make this freshwater lagoon unique.

The stoutest tree in the world.

Inside this mountain lies several kilometers of breathtaking caves.

A dark tunnel leads to a striking white crater that seems to be from another planet.

Cave where bat-eating snakes hang down from the ceiling.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

A flooded Mexican cave that hides a river beneath the water.

Two waterfalls flow down the cliff faces decorated with rare natural basalt columns.

This beautifully deceptive waterfall is something far different from what it appears to be.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

High atop a Mexican rainforest mountain, this ancient pyramid once drew pilgrims countries away.

These azure waters were thought to lead to the Mayan Underworld.