Waterway populated with abandoned projects, including a submarine.

A large camera obscura, constructed entirely from digitally fabricated components.

A mysterious air force base built to resemble a Long Island fishing village.

The mansion home of author Edith Wharton.

Friction between grains of sand cause a curious "singing" sound.

The filming location of a shark attack in Steven Spielberg’s famous shark movie.

Eclectic collections, artwork, and some feline friends fill the writer's former home.

This abandoned radar station from the Cold War era now only broadcasts a seriously ominous air of isolation.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

Each August, one of the largest religious (and food) celebrations in the country is held in Boston.

The trials and tribulations of marking Poe’s grave.

A museum dedicated to exhibiting remarkable outsider art.

Used as an example in one of the first dictionary entries for "museum" in 1706.

One of Europe's oldest libraries.

A complicated contraption for telling time by the moon.

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

An ancient Egyptian temple in the middle of Madrid, Spain.

Cursed swimming pool left abandoned is now a favorite of filmmakers and ghost hunters.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

A dead saint, a deadly poison, and a mysterious holy ooze.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

Italian cave with exceptional acoustics and an unsavory history.

Every inch of this chapel is covered in craftsmanship from across the world.

The world's most active stratovolcano is almost always erupting.