A bizarre roadside attraction and the first instance of miniature golf in the world.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

This historic train station has been converted to a locomotive themed hotel.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

Be on the lookout for the symbolic insect all over the city.

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

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

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

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

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Striking occult iconography on a medieval German church.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

Home to the "Rat King" of Nantes and other wonders of the natural world.

Elevated freight railway turned wildly successful urban park.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

Julia Morgan's Moorish-Gothic labyrinth of fountains, trees, natural light and Oakland's notable dead.

A unique market that brings together various goods and cultures.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

A man-made island in scenic San Francisco Bay.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.