A long-disputed island that Denmark and Canada claim by periodically alternating flags and bottles of liquor.

Housing a morgue, rare and confiscated weapons, and autopsy remains, the Vancouver police museum displays the dark side of Canada.

A bizarre collection of gifts to North Korean dictator Kim Jong Il from the despots of the world.

Light still pours into the ruins of this ancient Islamic observatory.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

The lovely lake that was naturally dammed, then naturally destroyed, then unnaturally saved.

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

An ethereal glowing blue ocean cave in Croatia.

This heart-shaped island looks substantially less lovely after a recent bulldozing project.

Ming Dynasty necropolis raided during the Cultural Revolution.

A stately palace has been converted into the world's largest cannabis museum.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Pop culture has helped to keep this iconic British building from being destroyed.

What was once thought to be a wellspring of unicorn bones is actually just a prehistoric burial site.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

The prototype for all Nazi concentration camps.

Terrifying derelict military hospital once housed a recuperating Hitler.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

The fairy tale castle of the "fairy-tale king."

A unique underground structure dating back to the 1st century BC.

The curious underground history of keeping Paris clean.

Ancient paintings known as the "Sistine Chapel of Cave Art."

This massive library holds what was once the largest book collection in the world.

999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.