To gaze upon the visage of Sri Lanka's biggest Buddha, one must first pass through the Tunnel of Hell.

This abandoned airplane hanger is said to have once been a top secret launch facility.

This abandoned Olympic skiing facility still bears the scars of the Siege of Sarajevo.

This former coal mine has been turned into a sprawling modern art complex.

Two distorted Romanesque columns hold aloft a mine cart in honor of laborers who died during WWII.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

One of the largest caverns in the world has a maw large enough to stack cathedrals in.

This abandoned fort is said to be the most haunted place in India, so much so that entry is prohibited after sunset.

Over 80,000 carved wood blocks make up one of the world's oldest intact Buddhist canons.

This Canadian monument to the man who invented the telephone allows visitors to get up close and personal with the artifacts of his life.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.

The first museum in the world devoted to sexual gadgetry.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

Bizarre dirt trail winds a narrow path above the tree line.

Five ancient libraries, little changed for centuries, preserve a medieval archive of Quranic lore and civic documents

A bloody history is captured in this former prison turned museum.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

This museum was invented in a novel before being made real by the author.

The largest game reserve in Africa is home to thousands of species but refuses to house humans.

An unsettling painting of three faceless sisters that is surrounded by history and legend.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

The palace of the King of Kings, burned by Alexander the Great.