The "world's smallest volcano" has been used to store meals and dispose of dead bodies.

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

The ruins of an ancient city built by Mayan traders is centered around a temple of a sacred feathered serpent deity.

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

The development of this cliffside waterpark is representative of Mexico's history of co-op tourism developments.

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

The Mexican painter Diego Rivera created this unusual museum to display his collection of pre-Hispanic artifacts.

The singular ruins of a mysterious lost city.

Frida Kahlo's childhood home, now a museum of her life and works.

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

A haunting—but not haunted—chapel remains in the woods.

Take a stroll through this centuries-old tunnel of enormous moss-hung evergreens, nestled among the grounds of America’s first public sculpture garden.

The vintage, artistic cage of the city’s first lift welcomes visitors to an old heritage building.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

One man's extraordinary topiary garden in a small South Carolina town.

Perhaps the oldest vine in North America, this sprawling plant helps make a sweet wine.

A glimpse into the sacrifices of military members during World War II.

This concrete amphitheater offers an unforgettable view of one of Mexico's most beautiful canyons.

The jewel of western Mexico's archaeological legacy is this tiered circular pyramid now covered in grass.

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

A 1542-foot-long suspension bridge offers scenic mountain views.

This bridge over the River Cuale leads to a neighborhood that was once an escape for Hollywood's elite.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

A wild Hollywood resort thwarted by mosquitoes.