A layered tribute to the work of mosaicist Isaiah Zagar.

Packed to the ceiling with antique taxidermy and hunting arms.

A stunning 18th century pharmacy and medieval chemist's collection.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

An ethereal glowing blue ocean cave in Croatia.

A world-class collection of mechanical musical instruments and automata.

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

The most confusing clock in New York.

More than 5,000 contemporary and "historic" mustards from around the world.

A battle between nature and architecture in the Cambodian jungle.

A curious friendship between two inanimate ladies.

A rare view of a preserved Victorian science museum.

A wall of chewing gum moonlights as collective art.

A marvel of Byzantine engineering under the streets of Istanbul.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

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

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Elevated freight railway turned wildly successful urban park.

One man's swirling six-acre monument of stone.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

An eccentric playboy's astounding natural history collection.

A Natural History and Science Emporium.

A store that sells all manner of bones, insects, and animal curiosities.