A sea cave with a waterfall and Viking past

This king penguin is a knighted brigadier of the Norwegian Army.

During this Shetland Islands celebration, hundreds of torch-carrying "guizers" lead a procession to burn a viking longboat.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

This waterfall is one of the most spectacular natural features in the Scottish Lowlands.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

A breathtaking flower tunnel bursts with beautiful golden blossoms.

Legend says a witch conjured the world's third largest whirlpool to protect Scotland from a nasty pirate.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

This ethereal, rainforest-like gorge is home to waterfalls, quaint bridges, and fairy folk.

The names Lúthien and Beren can be found inscribed on the shared grave of the famous writer and his beloved wife and muse.

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

A familiar otherworldly creature guards this 12th-century Scottish abbey.

Summer in Scotland begins with a spectacularly wild and colorful event rooted in ancient pagan traditions.

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

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

A book bound in the skin of an infamous criminal, along with countless other specimens.

A unique waterfall that some believe attracts the fairfolk.

A fantastic castle rumored to be the birthplace of King Arthur.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.