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

The site of Paul Revere's historic two lantern warning.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

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

"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."

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

A fitting attraction for the corn capital of the world.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

The only road through the heart of Glacier National Park.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Largest illuminated advertisement sign in the world.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

There are eight natural springs around town, each with a slightly different taste.

It would be easy to walk past this unusual piece of art and have no idea it pays tribute to the odd life of a real chicken.

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

Where scientists keep miles of very valuable ice from Antarctica and Greenland from melting.

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

This iconic science fiction house still looks like something from the future.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

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