A 19th-century subterranean reservoir repurposed as a contemporary art cave.

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

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

Hans Christian Andersen for the postmodern world.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

A collection of noses tucked inside an art museum reveals how times have changed.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

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

A floating underwater hotel, created by a Swedish artist.

Sweden's largest optical telescope sits on a rooftop in Stockholm.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

It houses the remains of a 17th-century version of the Titanic.

Sweden's "good old days" painstakingly re-created in a model village.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

The world's largest model of our planetary system.

On a site with a long military history, a 1980s shelter.

A petite castle folly in the English countryside.

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

Eighteenth-century home, where Herschel discovered the planet Uranus.

Museum about life, death, and cannibalism in the Stone Age.