Something's watching you.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

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

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.

Every year, the colorful murals of Montreal get a complete makeover.

This enormous World War II relic is one of the largest wooden structures in the world.

This poor little statue is the most vandalized memorial in Washington.

Memorials and tributes scattered across the university grounds remember a famous national tragedy of the Nixon era.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.