These enigmatic columns tower over the ruins of an ancient Toltec city.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

The ruins of an ancient Mayan city, beautifully preserved and only accessible by boat.

The splendor of this 17th century golden chapel has led it to be called the "eighth wonder of the world."

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

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

A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla.

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

The largest cave shaft in the world is home to thousands of birds and popular with BASE jumpers.

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

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

Extraordinary sculpture garden created by an eccentric English poet.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

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

A gargantuan crystal kingdom.

The headquarters in Salem doubles as an occult art gallery.

Toy museum in a former tavern is the expression of one man's life pursuit of the aesthetic power of cartoon imagery.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

This handsome giant is said to mark the birthplace of the mythical woodsman and even had a cameo in a Stephen King novel.

The Zalud family experienced a number of tragedies in one decade, giving rise to rumors that the 19th century house is haunted.

Experience the "opulence, grace, and grandeur of Eureka's most famous Victorian Inn."

The rocks in this arid basin leave trails of movement behind them.

Machinery left over from California's once thriving mercury industry now attracts artists and explorers.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.