This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Museum dedicated to the terror regimes of Hungary.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

Eighty million natural history specimens call this gargantuan museum home.

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

Catacombs turned marketplace.

The curios of pharmacist and collector Henry Wellcome.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

One part local history, 99 parts gruesome haunted house.

An artistic tribute to the famous singer, just around the corner from where he was born.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.