The small alleys in Lübeck's Old Town are a result of medieval urban sprawl.

An early 20th-century bullring converted into a modern shopping center.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

A celebration of capitalism in Midtown.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A multiversal transit station located right below a highway interchange.

The metal leaves on this tree are engraved with the names of Holocaust victims.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

Museum dedicated to the terror regimes of Hungary.

Once the home of a hermetic monk, this cave now houses a small church.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

More than 450 years ago, an Italian nun became the first woman to paint the iconic subject.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.