A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

This German monument honors the so-called "Prince of Mathematicians."

Bursting forth from a historic German neighborhood, these day-glo palaces are now a bright fixture in the town.

Retirement home for giant obsolete machines.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

Art and a pun, all in one.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

This charming Latvian lane doubled as Baker Street on the Soviet Union’s version of Sherlock Holmes.

Myanmar's beautiful cemetery for Allied soldiers who perished during World War II.

The church's remarkable frescoes incorporate Finnish artist Hugh Simberg's trademark themes of death and the supernatural.

The last permanent exhibit dedicated to the Soviet leader.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

A narrow strip of land is home to the tallest migrating dunes in Europe.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

A dream-like maze full of strange art, surreal spaces, and fantasy landscapes to get lost in.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

A rare double mill nestled along the banks of the Aa river.

This neighborhood of futuristic ball houses looks like an alien settlement in a science fiction film.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

This historic Dutch newspaper building is covered with media-themed details—and one unrelated oddity.

An unassuming rod in the Netherlands was once the old standard unit of length for the entire Dutch empire.