The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

The oldest housing complex in Riga is a mini timeline of architectural trends.

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

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

It houses the remains of a 17th-century version of the Titanic.

One of the world's tallest statues is also one of its most hated.

A 360 degree battlefield experience.

World's largest bell sits on the grounds of the Kremlin in Moscow.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

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

A muddy alien landscape that is home to rare species of exotic plants.

The growing stones of Romania.

This eccentric folly house was designed by Romanian thinker Bogdan-Petriceicu Hasdeu, with a helping hand from his deceased daughter's spirit.

Something's watching you.

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

Conspiracy theories and occult legends surround this mysterious natural rock formation.

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

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

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

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

Christ's blood preserved in a Belgian town.

This gruesome biblical parade celebrates the one day a year that a bit of Jesus' blood turns to liquid.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.