This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

This automated sculpture of two men peeing will spell out text messages with their micturition.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

The ruins of a sixth-century monastery sit on the banks of the River Shannon.

A set of outdoor stairs named in honor of a famous Austrian artist.

This 17th-century Portuguese fort now houses a nautical museum.

This park built on a former fortress has a reputation for romance.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

These animal carvings stand as a representation of India and Britain.

This work of engineering is imbued with elegance and ingeniousness.

The first monument in Estonia that was made by an Estonian sculptor.

Once used to protect important Roman trade routes.

During the Soviet era, the spire of this longstanding church was used as a radio transmission tower.

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

This legendary giant, born from vegetables, terrorized townspeople and cheated local children in games.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

A massive tribute to Estonian history and culture.

Stretching for 22 miles, the world's longest tree-lined avenue dates back to the early 17th-century.

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.

Tower with a double-helix spiral, adorned with letters of the Georgian alphabet.

A literally moving statue of stacked metal giants just continually trying (and failing) to find love.

The first skyscraper to include a Ferris wheel built into the facade.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

Carefully reconstructed after the Bosnian War, this 16th-century bridge stands as a symbol of the country's enduring multicultural heritage.