An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

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

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

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

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

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

Rusty red sands line the shores of this Canadian Province.

Iconic rock formations that allow for exploration during high or low tide.

Thousand-year-old trees tower within one of the world's only inland temperate rainforests.

Hoodoos, naturally eroded land formations, stand 20 feet tall in the Canadian badlands.

One of Mother Nature’s geological gems, home to many prehistoric fossils.

A hiking area billed as a possible home to Bigfoot.

The world's largest dark sky preserve is a Canadian park established to preserve the country's last wood bison.

The highest tides in the world come in and out here twice a day, allowing you to essentially walk along the ocean floor.

Little island known for its massive beachfront "flowerpot" pillars.

This crescent-shaped sliver of sand is a magical haven for a herd of feral horses.

Cliffs that hold fossils, including the earliest known reptile, dating back more than 300 million years.

A sacred lake composed of over 300 separate pools of highly concentrated minerals.

Fossils, railroads, and waterfalls!

Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

This natural sea cave hides a small wonderland of natural turquoise beauty.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.