A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.

Furniture tries to escape an abandoned building in San Francisco.

Radioactivity still cause for concern at this urban explorer's paradise.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The curiosities and wonders of pharmacy in a delightful historic building.

The oldest operating pharmacy in the world features 800-year-old recipes.

The largest and most famous wax anatomical collection anywhere in the world.

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

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

Guarded by the Angel of Grief, the Stanford family tomb attracts an odd mix of halloween revelry and somber contemplation.

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

A church of bones, decorated with 40,000 human skeletons.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Full-sized barn houses many restored instruments.

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