Vikings and Evangelicals have both had a hand in this replica medieval church.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

Walk up a ramp through a forest for panoramic views of Lake Michigan.

A unique botanical garden housed in three giant geodesic domes.

This striking art museum holds an amazing series of curiosity cabinets.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

A place to eat for on-the-run agents and espionage enthusiasts.

What appears to be a wizard's lair in Milwaukee actually houses a massive water pipe.

A group of artists transformed this desolate city alleyway into an outdoor gallery of street art.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The "dragon babies" of southeastern Europe.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Breathtaking and huge 430 year old maps of Italy.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

A floating cat sanctuary on an Amsterdam canal.

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

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.