Former headquarters of the KGB.

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

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

There has been an astronomical clock on this spot since the 14th century.

The bears of Bern have been a city highlight for over 500 years.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

Featuring a meatless buffet fit for kings, this family-owned Zurich eatery is considered the oldest vegetarian restaurant in the West.

An unusual vending machine designed to support mourners during funeral ceremonies at Zurich's largest cemetery.

Vines grow up the metal bars in this public park created from an old machine factory.

A small and surprising passageway in Saint Petersburg devoted to the Beatles.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

Enormous, fluffy dogs frolic around this museum dedicated to a legendary Saint Bernard.

Largest illuminated advertisement sign in the world.

Sofia's legislative center is continuously reinventing itself.

"Holy Wisdom" overlooks the city that became its namesake.

A striking symbol of the Bulgarian capital.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

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

The beautiful, ornate weather station is the most popular geocache in Salzburg.

Apartment complexes built into huge repurposed natural gas tanks.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.