Be(w)ar(e) the moat around this historic Czech castle.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

This isthmus in the Bahamas narrowly separates the roiling Atlantic from the cool Bight of Eleuthera.

The bronze uniforms commemorate the vital role of women during World War II.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

A 220-foot deep watery drop-off, filled with marine life.

A little sculpture with a large wardrobe.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

Launched by Napoleon's soldiers more than 200 years ago, a cannonball remains embedded in the tower wall.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Breathtaking and huge 430 year old maps of Italy.

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

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

Ancient ruins hidden underneath a modern luxury hotel.

This bridge was constructed from the rubble of the infamous Bastille.

The celebrated eyesore created by starry-eyed sweethearts.

This demon atop the Notre-Dame de Paris looks utterly bored.