The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

An enormous, inside-out glass globe built in 1935.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A crumbling hospital from the 1850s on Roosevelt Island.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

A mysterious taxidermy man-beast of the seven seas.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

Few other hotels can rival the grandeur of the Castle in the Rockies.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

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

A unique sculpture park that specializes in the huge and bizarre.

A layered tribute to the work of mosaicist Isaiah Zagar.

An essential stop before plundering, BYO Cutlass.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

Adobe ruins punctuate the beauty of an 800 foot canyon carved by the Canadian River.

A chaotic collection of maritime artifacts, art, and really whatever else happens to be around.

This rocky spread has been squeezed up directly from the bowels of the earth.

These aggressively sustainable art homes look like something out of 1970's science fiction.

A modern addition to the Greenpoint skyline.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

This beautiful Brooklyn monument over a crypt memorializes a grim and largely unknown story from the American Revolution.

This elaborate tunnel is the first structure composed of cast concrete in the United States.