One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

This grisly exhibit houses skeletons and weapons from a devastating 14th-century clash.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

This roadside attraction looks like a flying saucer parked atop the tundra.

Cold storage for agricultural biodiversity.

This Arctic mining town is home to a cat that's spent years masquerading as a fox.

At this Arctic outpost, get to know members of the indigenous Sámi community and meet their herds.

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

An artist's mausoleum with a haunting echo.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Monuments don't get much more metal than these three giant viking swords planted in a Nordic hill.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

An intricately carved Viking church overlooks a glistening fjord.

Norway has built what may be the world's most beautiful public toilet.

The medieval town's star-shaped walls are geometrically dazzling, though not entirely impenetrable.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Somewhere there is a giant who can no longer poop, but now travelers can stay inside his anus.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

A taste of Middle Earth, in the middle of the Bayou City.

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

Kyiv's answer to Muscle Beach is a Soviet-era gym made from scrap metal.

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.