The only surviving piece of Copenhagen's 16th-century defensive wall.

This contemplative sculpture made out of old machine parts is meant to be the first in a series of sculptures around the world.

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

Hans Christian Andersen for the postmodern world.

Site of the first radio and telephone broadcasting companies in Copenhagen.

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

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

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

After funding was cut for a memorial to the Danish author, the sculptor had his statue ceremonially lowered into the city harbor.

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

This risqué sculpture, based on a Hans Christian Andersen fairy tale, caused outrage 35 years after it was erected.

The last Viking king of Denmark is buried inside the crypt of this cathedral.

The skeletal frame of a decommissioned gas-pumping station offers breathtaking views of greater Berlin.

Several of these strange cone-shaped bunkers can still be seen around the former Nazi headquarters.

The ruined remains of the airport Claus von Stauffenberg departed in his failed attempt to kill Adolf Hitler.

A statue of Vladimir Illyich Lenin guards this abandoned building in the "Forbidden City."

The largest brick bridge in the world.

A museum that chronicles the history of the Nuremberg Trials for Nazi war criminals in the building where the trials were once held.

The prison where Hitler wrote "Mein Kampf," and 278 Nazis were later executed for war crimes.

A hole in the floor of this chapel is said to have been created by a footprint of the devil.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

Cell phone tower constructed entirely of wood.

An old slaughterhouse now holds the largest collection of pig artifacts.

This 18th-century folly is one of Europe's rare "garden mosques."