A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A museum devoted entirely to the rattlesnakes and snake-related art.

Medical museum focused on antique anesthesiology equipment.

Dental instruments from the illustrious history of American dentistry.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Australia's largest medical museum featuring a 19th-century pharmacy.

An Arizona museum with a collection of pharmaceutical oddities, including a jar of a gangster's chewed gum.

A terrific purveyor of natural history objects and curios.

Outsider Art Community.

America's first public mental health facility.

A vision of beautiful Hindu architecture in the middle of the American South.

6000-year-old site covered in more than 50 megaliths.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

A modern zoetrope on the New York City subway.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."