A black cat protests the City Guild in Riga's Old Town.

Looming communist pillar with a Czech twist.

The site where Poe “in great distress, and ... in need of immediate assistance” likely died.

A naturally mummified 2,000-year-old man.

Khmer Rouge's high security prison.

A little sculpture with a large wardrobe.

The tallest hotel in Europe.

Stalinist skyscraper built with help of cryotechnology.

Former headquarters of the KGB.

Eighty million natural history specimens call this gargantuan museum home.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

An incarceration museum on the spot of possibly the oldest prison in England.

Hear the quietest sound from across the dome.

This picturesque archeological site looks like it was pulled straight from a fantasy novel.

Part museum, part piece of Arthurian-inspired history, this stately hall attracts King Arthur fans from miles away.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

This Scottish museum is the only one in the world to focus not on one religion but all of them.

Public access to clean drinking water was an instant hit among the masses.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

The final resting place of soldiers' loyal canine companions.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

The famous boat that once ferried Bogart and Hepburn still floats in Key Largo after being abandoned for years.

This South London cemetery holds the remains of more than 15,000 people.

The "lovely red Vega" of the legendary record-settling pilot.