This sublime architectural marvel is a rare example of an expressionist church.

The remains of a magnificent medieval fortress that was the capital of a vast empire.

Historical trolley restoration and operation at History San Jose, Kelly Park.

A mysterious monument covered in a binary code marks the heart of tech.

This museum is a portal to 20th-century Denmark.

This antique farmhouse is one of Læsø's rare seaweed houses.

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

An exhibition of preserved locomotives housed in a 1950s depot shows the history of Denmark's railway.

An architect transformed this abandoned cement factory into his castle-like workshop.

Rumors of the occult haunt this upscale 1920s hotel.

Volcanic rocks ground down into sand make this Spanish beach as black as night.

Rainbow-hued in the summer and crystalline in the winter, this salty lake has inspired battles, temples, and plenty of awe.

A public urinal so pretty, it was declared a national monument.

Plans for this local observation tower were debated for so long, the allocated funds lost value and the design had to be changed.

A public display of random paleontology.

The world's largest concentrated solar power plant.

Hidden behind mountains in Morocco, a remote town hides a thriving surfing community.

This record setting conveyor belt system can even be seen from space.

The oldest known university in the world is in Fez, Morocco.

A Moroccan getaway in the mountain range that plays the Himalayas' stunt double.

In legend, this ancient dolmen was said to have been created when a troll tried to destroy a church.

An "evil painter" included pointed symbols in this artwork to poke fun at members of the Danish Parliament.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.