A domed disco abandoned since the '70s now attracts artists and explorers under its unique roof.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

This ultra-modern burial building would have stacked the dead like a giant filing cabinet.

While most books are made of wood, these wooden books are truly made of, and all about wood.

A gorgeous medieval library where the books are kept in chains.

A remarkable cabinet of curiosities in an art space in the center of Berlin.

A slice of central Asia in the middle of Berlin.

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

Once a meeting point for great thinkers, and the midpoint of the country.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

The world's first combination ski slope and power plant.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

A small Denmark town displays a pair of titanic jaw bones as their community symbol.

This Danish rock field is actually a sprawling ancient cemetery holding the bodies of 700 Vikings.

Four alabaster giants contemplate the tides on the shore of Denmark.

Remnants of the Nazis' occupation of Denmark linger along the sand.

A beautiful photography exhibition space housed in a former church.

Residents of this seaside village are building a miniature 1:10 scale version of their historic town.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

Metro station with a claim to rock n' roll fame.

Iceland: home to volcanoes, waterfalls and, apparently, Santa?