This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A surreal museum of extraordinary industrial objects.

Started as a kitchen garden, now the second largest botanical garden in the world.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

The remains of Crystal Palace Great Exhibition of 1851.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

Rebuilt remains of a temple to Roman god Mithras.

One part local history, 99 parts gruesome haunted house.

Eighty million natural history specimens call this gargantuan museum home.

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

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

This eclectic natural history collection holds everything from a bit of the trans-atlantic cable to Hemingway's marlin.

A son's promise to his dying father in the form of a covered bridge filled with thousands of seashells.

Cryptid lake monster honored with its own monument.

This path is named for a mythical half-boar, half-deer creature that once roamed the Green Mountains.

According to folklore, Vermont's slanted windows were installed to keep witches from flying into the house.

The Vermont grave of a 4,000-year-old mummy prince.

This folk art dinosaur was almost pushed to extinction due to lack of a building permit.

This "common-as-dirt" museum celebrates the glory of normalcy.

This New England covered bridge is home to the tale of a jilted lover known to haunt the area.