This modern pedestrian bridge on the Yarra River was modeled after an Aboriginal fish trap.

A century-old church is now a space museum with a treasure trove of Soviet space items.

The painter who popularized "bulls" and "bears" as symbols for the stock market didn't get a proper headstone for over a century.

Old neon signs from the City of Brotherly Love provide a snapshot of the city’s evolution.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

Some believe this abandoned Brutalist masterpiece inspired George Lucas's Sandcrawler.

An ancient burial ground believed to have been used for ritual sacrifice.

An ancient Phoenician citadel once stood at the site where Queen Dido first landed, according to legend.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

A cheeky architectural easter egg.

Europe's second largest ossuary wasn't discovered until 2001.

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

Tucked away in a Prague park, a statue beloved by romantics honors a poet so nice they buried him twice.

A surreal statue honoring Prague's favorite literary son.

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

Two stunning 17th-century libraries and a cabinet of curiosities.

Walk through Czech history in Prague's largest graveyard.

Monasteries on rock pillars, once accessible only by frayed ropes.

This historic structure has been used as a mosque, a barracks, a prison, a school, and a bakery.