One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

This glass-stain Mary attracted thousands of pilgrims until her head was shattered by a vandal with a slingshot.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

The world's largest private aircraft collection.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

This statue of an obscure comic strip hero stands as a tribute to patriotic service and a cautionary tale about embracing fads.

This iconic science fiction house still looks like something from the future.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

Medicinal spa created with the discharge from a geothermal energy plant.

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

A haunting collection of the vanished and disappearing natural world.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

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

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This museum houses an imposing skeleton army comprised of creatures great and small.

The fairy tale castle of the "fairy-tale king."

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

The beautiful baroque library of the Hapsburg empire.

How did a French journalist’s grave become the sexiest statue in the cemetery?

France's most famous cemetery, with some of its most curious tombs.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.