Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

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

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

An exquisite Baroque church in Vienna's old town.

Baroque celebration of the end of the Great Plague of Vienna.

The solemn exterior conceals an opulent interior of this 17th century church.

A mechanical clock built in 1914, with a rotation of 12 historical figures on its face.

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

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

A sculpture of a beloved local figure, who tipped his top hat to everyone he passed on the streets of Bratislava.

The largest fountain in Bratislava.

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

Brass plaques embedded in pavement preserve the memories of those who lost their lives at the hands of Nazis during World War II.

Krakow's own version of the Hollywood Walk of Fame.

Inside this Krakow church, an explosion of psychedelic color.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Catch a scenic view of Warsaw's Old Town from the top of a centuries-old dumping ground.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

The last king of Poland was interred in this church nearly 200 years after his death.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

A castle perched precariously over the Crimean Sea.

This magnificent Crimean estate was once a playground of the Russian elite.

A fortress built to pacify local uprising that had a stint as a Nazi concentration camp before becoming a five-star hotel.