A water reservoir disguised as a castle stands atop a hill in a park in Stockholm city.

A collection of birches from across Sweden.

This bronze marker acknowledges an embarrassing royal blunder.

This seaside property, an example of Art Deco Streamline Moderne style, was designed to embody the curves of a great ship.

The gargoyles and grotesques of the 21st century are here—22 emoji built into a new building in the Netherlands.

A large measuring stick marks the lowest point of a country that is partially under sea level.

This unique sculpture proved invaluable when it saved a train from careening off the tracks.

The Netherlands is home to a bridge printed out of reinforced concrete.

These old World War II fortifications have been transformed into an unusual equine attraction.

One of the last remaining railway viaducts equipped with a transporter ferry.

With a bundle of matches in one hand and a mobile phone in the other, this sculpture is a modern take on Hans Christian Andersen's poignant fairy tale.

Following the trail of an old metro line, this scenic path is haunted by a creepy spriggan statue.

A pristine beach on the Gulf of Mexico with deep ties to Pensacola’s Black community.

Several colorful mosaic panels depict the life and creative genius of the Master of Suspense.

You can still see bits of the camouflage used to hide this Art Deco building from bombers during World War II.

Eclectic final resting place of the controversial explorer.

This home on a quiet suburban street is completely covered with vibrant mosaics.

These marks in Myddelton Passage aren't your run-of-the-mill vandalism, and they weren't made by your typical vandal.

Legend has it that seven Anglo-Saxon kings were coronated on this stone, located in the appropriately-named town of Kingston.

An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

An alien church provides much needed silence in the midst of a Finland shopping center.

A spiralling hourglass-shaped tower rises from the forests in Denmark.

Houses are tucked between, on, and underneath giant boulders.

This vessel is the final ocean-going paddle steamer in the world.