An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

A poem by Arthur Rimbaud is inscribed on the wall of a street that, while it is only one block long, plays a key role in multiple novels.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

The approximate spot where the last Grand Master of the Knights Templar was put to death.

Where the high court feasted, frolicked, and high courtesans put their royal lovers' diamonds to the test.

This frog-themed restaurant was frequented by Picasso, Saint-Exupéry, and more.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

This roadside attraction has been serving out its fair share of hearty folklore and chaos since 1858.

This bright yellow relic is the final survivor of a short burst of seashell-shaped petrol pumps.

It may take some time to locate, but it's sure to warm even a heart of stone.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

A folk art mecca famous among outsider art fans.

The humble horn finally finds a place in the sun.

Rotting dome home spotted near Chapel Hill, North Carolina.

A mailbox that saved a nature reserve.

Don't be surprised if you see a long-necked dinosaur peeking out from among the trees in Northgate Park.

The top of a giant mesa, just outside of Amarillo, appears to float in the sky above.

Conjoined twins Daisy and Violet Hilton were stars of the vaudeville circuit.

A tunnel of hardened lava along Maui’s famous Road to Hana.

A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.