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.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

The curios of pharmacist and collector Henry Wellcome.

Rebuilt remains of a temple to Roman god Mithras.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

Eighty million natural history specimens call this gargantuan museum home.

Essence of hound's tongue and tincture of bloodroot are just the tip of the herbalist iceberg at this beautiful, impressively-stocked apothecary.

The first declared National Monument in the United States.

Canyon walls shrouded in ferns.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

A tourist attraction founded around a slumping cabin.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A botanic garden full of trees twisted into fantastic shapes and positions.

Treehouse motel and treehouse-building school.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

One man's ambition created this psychedelic log home.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

Step into the cool deep past and unknown future of who begat who.

The highest peak in Utah is the hardest to reach, but only if explorers choose the hard way.

Pyramid home to an obscure religious group that practices modern mummification.