Secret North Korean passage discovered below the world's most dangerous border.

The rusting hulk of a hand-powered, nearly 160-year-old submarine abandoned in 1869 due to the ravages of decompression sickness.

A pocket of jungle amidst urban expansion in Panama.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

A mouldering Colombian bull ring stands as a reminder of the country's complicated relationship with a brutal sport.

The mysterious "Candelabra of the Andes" could represent anything from a god's trident to a hallucinogenic plant.

An unexpected desert oasis in South America.

On this tiny spot of land in the middle of Lake Titicaca the only ones who do the knitting are the men.

The Uros people live on floating reed islands in lake Titicaca.

Nazca pilgrimage site covering 370 acres is a popular stop for archeologists and looters.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Soaring over the Niagara Whirlpool since 1916.

A community-run museum invites visitors to explore Jewish communities before and after the Holocaust.

Canada's largest graveyard boasts a lot of noteworthy artifacts as well as its own computerized mapping service.

A massive Montreal stadium that has seen nothing but trouble since its inception.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

Once home to over 8,000 exiled Hawaiians suffering from Hansen's Disease.

Willy Wonka would love this weird half-a-home.

One of the largest underground systems runs under Canada's largest urban center.

The remains of a Canadian train crash are now mouldering beneath layers of rust and graffiti.

Submerged lava formations create incredible waterworks.