World's largest working waterwheel has been around for over 150 years.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

The world's first ice hotel is still one of the most elaborate and beautiful.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

These upturned herring boats make nifty storage sheds for fishing goods.

This tidal island, a sacred site in early English Christianity, was the target of a notable Viking invasion.

Legends say this red sandstone monolith and the dozens of smaller boulders that surround it were once a coven of witches—before a Scottish wizard turned them all to stone.

A Neolithic burial tomb connected with a colorful array of legends.

The only medieval bridge in Britain with its defensive tower still in tact.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

This fantastic museum honors Gloucester waterway heritage.

Believed to be the smallest castle in Europe.

A petite castle folly in the English countryside.

The home of an eccentric Edwardian gentleman is packed to the rafters with handcrafted items collected over a lifetime.

A majestic mansion designed in Mughalai style, complete with a turquoise onion dome.

This trio of neolithic stone monuments are fabled to be a king and his knights that were petrified by a witch.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

Fifty years of contamination in Scotland's waters.

A sea cave with a waterfall and Viking past

The sign marks one of the endpoints to mainland Britain's longest overland travel route.

Cut into a sheer cliff face, these stairs are the only way to reach a secluded Scottish harbor.

This site contains overlapping ancient graveyards that existed about 1,000 years apart.

This burial pyramid in central Ireland is thousands of miles and thousands of years away from its Egyptian inspiration.