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

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

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

This 1967 experiment in modular architecture was designed to be a new model for urban living.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

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

Towns with a resource known as "white gold," valuable enough to fight a war over, now stand ghostly and empty.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This abandoned Greek island was the last active leper colony in Europe.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

Where commuters walk through remnants of an ancient Greek necropolis.

Large collection from the 3rd millennium BCE.

This famous archeological mystery may be an ancient example of movable type.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This legendary city has been a tourist attraction for centuries.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.