A bright little alley in La Boca is a part of tango history.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

The last bastion of Roman presence north of the Alps looms over a German town.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

This 23-foot-tall bear stands amid the hustle and bustle of Hamad International Airport.

This 15th-century fortification was built to defend bunnies.

Cycle the solar system—from the sun to Pluto—right here on earth.

An incredibly well-preserved piece of ninth-century Viking poop.

One of the shortest streets in York has an especially odd name.

Follow the original medieval paths that wind through this intriguing section of the city.

This medieval church is not only notable for its architecture, but also its connection with LGBTQ+ history.

This network of narrow, medieval passages has the most delightful name.

A century-old tradition has culminated in a small but singular collection of feline effigies.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

A Reformation-era fiery figurehead once denoted this location as a print shop.

Semaphore saints, a golden dragon's head, and a stone carved with religious warnings all call this cathedral home.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

After public executions took place at this location, attendants would also attend a local horse race.

Locals spent years successfully fighting to save this beloved Brutalist behemoth from demolition.

The now-quiet remains of coastal artillery defenses that were used in both World Wars.

This foolish Victorian sea fort was converted to a deluxe hotel.

This lighthouse was crafted as penitence for the theft of wine bound for a monastery.