Ice cream stand, snack bar, and time capsule of milk conveyance.

The only road through the heart of Glacier National Park.

The stone labyrinth in this New Orleans city park was laid to symbolize healing in the wake of Hurricane Katrina.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

The only rotating bar in New Orleans has been slowly spinning since 1949.

The lecture hall where Alexander Graham Bell first demonstrated the long-distance phone call.

Who knew the Devil's domain was a hot spot for tubing?

One of only two pod-shaped homes designed by Frank Lloyd Wright.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

This quaint museum lets you take a ride on its antique carousels.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Nature's biggest mammal swims in landlocked Oklahoma.

Yo, Adrian!

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

A house of courtship where the Jazz Age's most storied lovers got their start.

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

The resting place of a Civil War celebrity's amputated limb.

Largest Roman Catholic church in North America.

This fairytale-inspired cottage was created by a university literature professor.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

137 graves holding New England's earliest residents.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

"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."