Tubing through a cave lit with glowworms is a magical underground experience.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

An abandoned castle owned and ignored by Masons carries a cursed history.

San Francisco's newly reopened hands-on science museum.

Gift shop offering toe tags and chalk body beach towels tucked into a coroner's office.

Site of a former hidden treehouse in New Orleans.

A library of rare occult books in Los Angeles.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

Museum preserving torture methods from the past.

The longest hedge maze in the world.

360° views of the city plus five floors of optical illusions and hands-on science.

A curious collection dedicated to human and animal anatomy and pathology.

This lab's maddening silence is good for business but bad for sanity.

Become a prohibition rebel.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Stunning wetlands ablaze with pink lotus flowers.

A museum befitting the city responsible for supplying the majority of the world's LSD.

The beautiful baroque library of the Hapsburg empire.

Banksy gives themself artistic license with this piece of London street art.

A museum dedicated to the history and exploration of both popular music and science fiction.

A surreal museum of extraordinary industrial objects.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.