A massive relic of the communist era of Berlin.

Check the time in 145 countries at once with this East German relic.

The most visited, and possibly most controversial, museum in Germany.

Macabre astrological automaton clock dating to the late 1400s.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

This enchanting spring, steeped in local lore and a touch of royal history, was said to be the place where newborns were collected, rather than being delivered by storks.

This colossal hiking boot, once built for a scout jamboree, serves as an observation tower and barbecue area.

Along this stretch of beach in Denmark resides several massive bastions of energy.

This chimerical bridge/tunnel appears to dead end right into the sea.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

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

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.

The final resting place of one of the brightest physicists of the 20th century.

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

Even though some of the buildings date back to the Victorian era, this research institute is still involved in cutting-edge astronomy research.

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.

Erected in memory of Sir Arthur Conan Doyle, who was born close to this spot, this statue commemorates the author and his famous detective.

A never-finished memorial to the heroes of the Napoleonic War has become "Scotland's Folly."

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

This Scottish graveyard is the final resting place of the man who inspired the character Ebenezer Scrooge.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

Now home to a drinking establishment, this building has a macabre history.

The U.K.'s first underground railway line is now a lively thoroughfare for runners and cyclists.