Meant to resemble a massive tree, the building is the best example of Spanish organicist architecture in Madrid.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

The morbid items in this small and hidden museum are not for the weak stomached.

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

This architectural oddity is an oasis of green on the outskirts of Valencia.

An enormous Soviet aircraft, the only one of its kind, stands at the deserted shore of the Caspian Sea.

Take a ride back in time with a steam locomotive trip through Eritrea’s mountainous countryside.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

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

This inverted metropolis model is the artist's "revenge" for not being allowed to have a doll house as a kid.

A beautiful photography exhibition space housed in a former church.

Where you'll find anything but nothing.

Danish whalers once brought back whale bones to use as building materials in places where wood was scarce.

It might look like just a pile of sticks—because it is. But there's a dark history to how this stack got its start.

The traveling wares of Denmark's most famous author.

On a stretch of Danish coast known as "Cold Hawaii," this fishing village has become a surfing town.

A unique, modernist church tower that appears to float above the ground.

The house where a Danish physicist discovered the connection between electricity and magnetism.

The shiny silver little brother to Copenhagen's Little Mermaid statue.

Did he come up with a theory of cosmic-ray showers while sitting in this bath?

This World War II airfield enjoys a second life as a public park.

This modernist tower was saved by a fraternity with a 500-year-old penchant for shooting at wooden parrots.

An abandoned bear enclosure from a 19th-century zoo located in a Danish forest.

This remote island, home to the easternmost point in Denmark, once hosted pirates and a military fortress.