Have a ball telling the time at this giant kinetic-energy clock.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

There has been an astronomical clock on this spot since the 14th century.

This 14th century wine cellar is home to the oldest barrel-stored wine in the world.

This splendid tomb may look fantastic, but there's nothing in it...

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

This ancient market is often referred to as the oldest shopping mall in the world.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

In Florida, these naughty monkeys live on their own mini-monkey Alcatraz.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

This abandoned, partly demolished building is now home to beautiful graffiti and murals.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

The Hveragerði fissure runs through this unassuming shopping center.

A geothermal paradise with bubbling mud pools and bright blue hot springs.

Two whaling vessels that were sunk by an anti-whaling organization in 1986 now sit on the shore of this beautiful fjord.

A goblet-shaped rock that, according to lore, is the home of an elven hermit.

This black church sits alone among a field of lava rock.

A Wes Anderson-esque lighthouse that boasts magnificent coastal views.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

Dozens of large, brightly-colored paintings adorn the walls of the "street art capital of Iceland."

The oldest church in Iceland is one of the few to feature ornate decoration.