Former headquarters of the KGB.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

Romania's triumphal arch looks out over Bucharest.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The sign at the garden gate reads: "These Plants Can Kill."

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

An artsy hidden staircase leads to breathtaking views of San Francisco.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.