Eighty million natural history specimens call this gargantuan museum home.

Catacombs turned marketplace.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

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

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

The sign at the garden gate reads: "These Plants Can Kill."

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

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

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

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

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Anyone wanting to know what a dwarven mine sounds like need only visit the tunnels of this New Zealand artillery compound.

Nature's slip and slide.

This volcanic plug boasts the longest recorded history of any Scottish stronghold.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

Where the sleeping monsters of Scotland's oil industry are left to rust.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

One of the highest mountain passes in Europe has been ranked among the best driving roads in the world.

A massive, secret marina for the Nazis' most formidable weapon in the Atlantic.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

This stunning natural double arch, the largest in the Alps, went undiscovered until 2005.

This massive library holds what was once the largest book collection in the world.