This snug medieval lane is one of the narrowest streets in the world.

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

The ancient Greek Titan guards this massive dam holding a lightning bolt to symbolize electricity.

One of the most controversial statues in Romania is an emperor with no clothes.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

A celebration of all things tacky, garish, and bizarrely creative in the Romanian capital.

This bone-filled cave got its name after they found 140 bear skeletons inside.

Something's watching you.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Rock carving created 1,300 years ago 75 feet off the ground.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

Romania's triumphal arch looks out over Bucharest.

This once-derelict building is now one of the most beautiful bookstores in the world.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

Gigantic Romanian salt mines used to heal respiratory conditions.

One of the most poignant ruins of the Chornobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

This attraction was abandoned after the Chornobyl disaster.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

The dining hall that nourishes workers in Chornobyl's Exclusion Zone is also open to visitors.

This derelict superstructure was a very important warning system for the Soviet military.