The US Navy's only submarine museum is also home to the world's first nuclear submarine.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

A Circus legend leaves an unexpected endowment.

Electrical pylon in the shape of Disney's beloved mouse.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A museum dedicated to the alleged Roswell Incident.

Human ancestor’s 3.6 million year-old footprints.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

Ancient snack bar of the Roman Empire re-opened.

A "miracle" that seems to produce more holy fistfights than holy revelations.

Swarms of dainty flying insects swarm into the Petaloudes Valley to get busy.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Ancient serpentine sacrifice holder that has stood the test of time.

A marvel of Byzantine engineering under the streets of Istanbul.

A geological oddity topped with a 2,000-year-old pagan temple.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

A museum glorifying the life of Stalin, located in the city of his birth.