This statue was given to France by the United States to commemorate the centennial of the French Revolution.

This monumental mural crafted nearly 40 years ago is still in perfect condition.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

This statue honors the thousands of Allied avians that served and died for France during World War I.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

This stately mansion, built in 1787 by America's first Secretary of the Navy, is rumored to be one of the most haunted buildings in Washington, DC.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

An 18th-century townhouse that once hosted guests of the president.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

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

This one-time health resort was used by aristocrats around the world.

This colorful gate stands as an entrance to the walled city of Old San Juan.

This Greek Orthodox church houses the mummified body of St. Spyridon.

The Greek island's old British cemetery feels like a forgotten garden.

An unfinished Serbian Orthodox church with 1,389 golden crosses planned to represent the Battle of Kosovo.

A 14th-century Serbian Orthodox church that was once converted into a mosque under the much-disfavored Ottoman Empire.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

In the hometown of the Catholic saint and Nobel Peace Prize winner, a memorial dedicated to her legacy.

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

A whimsical bridge adorned with decorative dragons.

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