This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.

One could not be blamed for literally walking all over this supposed landmark.

5,000 skulls in memorial to those killed by the Khmer Rouge.

340-foot statue built to honour the Heroes of the Soviet Union.

A unique museum dedicated to culture and artistry of carpet weaving.

This mysterious but iconic tapered tower appears in many Azeri fairytales and legends.

A large collection of steam engines, organs, and fairground attractions.

This medieval castle is filled with an eccentric collection that ranges from ancient Egyptian artifacts to taxidermy to a mummified hand that was cut off during a duel.

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

Eighty million natural history specimens call this gargantuan museum home.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.