A statue built to honor the elite soldiers who fought for Latvia during World War I.

A stone marker and sculpture in the city of Riga stake a claim for the very first community Christmas tree.

This charming Latvian lane doubled as Baker Street on the Soviet Union’s version of Sherlock Holmes.

3,000 market stands in five former Zeppelin hangars.

This Dutch art piece became a Russian icon.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

Abandoned railway line circling the city of Paris.

An interactive museum dedicated to preserving and sharing the history of the home computer.

Backwards hour and minute hands and a timing mechanism that fluctuates with the temperature led to this clock tower's local nickname.

Colorful and chaotic stacked hotel in North Holland.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

The first green space constructed on an elevated viaduct.

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

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

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

The yawning maw of this pagan visage is said to bite off the hands of liars.

Two stone columns flank the grand Venice square, but there were supposed to be three.

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

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

This enormous gold Buddha statue was hidden inside a stucco decoy for centuries.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.