Mexico City's largest market contains a Willy Wonka-esque wonderland.

A stunning garden filled with fantastical environmental folk art and sculptures.

Bouncing, delightful, mechanical art at the MIT Museum.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

Impossibly life-like natural history models created out of glass by a father and son.

Books you don’t need in a place you can’t find.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

Three prestigious academic collections come together to create a world-class natural history museum.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

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

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

One of the biggest markets in Asia, under one of the continent's largest domes.

5,000 skulls in memorial to those killed by the Khmer Rouge.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

A "simple-hearted artist" turned an isolated Icelandic valley into his own art museum.

This stunning concert hall has become a symbol of Iceland's national recovery.

This collection of unique liquids allows visitors to wander the waters of Iceland's glaciers.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

A sulfuric martian landscape that looks far better than it smells.

The largest whale museum in Europe allows visitors to walk among life-size giants.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.