Malaysian fireflies create a dazzling display as thousands light up in unison.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Eighty million natural history specimens call this gargantuan museum home.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A remarkably well preserved tower dating all the way back to the Iron Age.

Britain's only herd of free-ranging reindeer.

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

This modern labyrinth lies in the shadow of a ruined medieval castle.

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

This Scottish bridge seems to compel dogs to leap to their death.

Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

The last inhabitants of one of the U.K.'s most remote islands were evacuated in 1930.

At high tide this strange footbridge appears to have no purpose whatsoever.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.