It houses the remains of a 17th-century version of the Titanic.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

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

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

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

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

The most visited, and possibly most controversial, museum in Germany.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

Macabre astrological automaton clock dating to the late 1400s.

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

The eccentric midcentury home of a suspected mafia gun-runner.

Brussels' favorite peeing boy has a sister.

Meet the bronze beloved pet to a family of famous peeing statues.

A little sculpture with a large wardrobe.

Cozy basement bar sports an inventory of over 2,000 beers.

Climb inside an iron crystal magnified 165 billion times its normal size.