An ancient wall in the shadows of the Amber Castle.

An underground city of salt.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

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

An iconic British fixture in an unconventional color.

In addition to escorting prospective couples to and from ballrooms, this lane was also a place for gentlemen to settle scores.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

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

It's a mystery as to why this inland village chose the dolphin as its symbol.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This monument depicts a harrowing event involving an escaped polar bear.

The last manually operated turntable ferry in the world.

These fantastically named natural pools look like something out of a Scottish myth.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

This collection of Neolithic monuments make up one of The U.K.'s richest archeological landscapes.

A doctor had this large tub carved into rocks to facilitate easier seawater bathing.

These quaint cottages feature built-in signaling devices for fishermen.

This beautifully situated lakeside Roman settlement was likely built during the reign of the Emperor Hadrian.

A museum in England’s Lake District dedicated to the trusty pencil wants you to know the story of their World War II spy pencils.

Stonehenge has nothing on Castlerigg’s views.

A long, winding trek rewards you with a gorge so captivating it inspired a painting in the Tate.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.

A beautiful medieval bridge allegedly constructed by the Devil.

A 12-foot-tall metal fisherman looks out over the promenade.