Dedicated to a synagogue that was destroyed after having survived World War II.

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

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

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

This statue points to another unusual companion work of art often overlooked by visitors.

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

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Legends surround an ancient tree trunk riddled with nails for good luck.

These two 15th-century metal rods allowed people to check if they were swindled or not.

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

Housed in a former air raid shelter, this museum is dedicated to the history of computing and video games.

Royals, rebels, and artists have all conversed at this grand 19th-century Viennese coffee house.

The medieval network of canals hidden underneath the city is opened to explorers each year.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

A plaque on the base of this statue holds a bewitching design.

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

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.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

A cherry tree growing atop a mulberry tree.

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

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.