A tunnel of hardened lava along Maui’s famous Road to Hana.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

Located within a historic park, the beacon is the oldest standing structure in Miami.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

A young woman's senseless murder led to the controversial psychological theory of the "bystander effect."

Freddie Mercury's childhood home is now a monument to the iconic Queen rockstar.

This monument is a stark reminder of the horrors of the Zanzibar slave trade.

Over the course of its history, this tiny island has held enslaved people in transit and served as a quarantine zone. Today, it's a giant tortoise sanctuary.

A battle between nature and architecture in the Cambodian jungle.

Hang out with thousands of butterflies in one of the world's largest such enclosures.

One of the holiest places in the region, devotees come to Tirta Empul to bathe in the holy spring water.

Hindu temple of the dead home to hundreds of long-tailed macaques.

This Balinese sea temple is thought to be guarded by the hundreds of monkeys that live around it.

Bohol's mysterious brown hills.

A patch of Philippines forest devoted to saving the lives of an emotionally sensitive species of googly-eyed primates.

This holy site either displays a centuries-old cross or a complete fake.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

This proud Teutonic warrior rises out of a German forest heralding a victory and measuring lightning.

This unique Renaissance castle was turned into a home for Nazi occultism.

Famously misunderstood wonder of the ancient world

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

A hidden treasure of an abandoned city lies deep in the jungles of Campeche, Mexico.