This tall Massachusetts folly got its name thanks to all of the purple prose its vistas inspired.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

A stunning garden filled with fantastical environmental folk art and sculptures.

An actual piece of the Moon, brought down to Earth by Apollo 15.

A giant ant model welcomes visitors to an exhibit about symbiotic organisms that live with army ant colonies.

Resonating tubes make music from highway overpass.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

Over 50 whirling pools left behind from the glacial age.

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

Surreal riveted sea forts once protected the Kent shores from German attack.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

It's believed King John of England stayed at this 13th-century castle before riding off to sign the Magna Carta.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.

A kaleidoscopic warehouse-maze of handmade neon signs.

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

Repository for more than 22 million pickled specimens.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

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

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

This overlooked street light once served as a KGB dead letter box.