The world's longest known cave system.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

The monumental steeple on Amherst College's campus has no church attached to it.

The "lovely red Vega" of the legendary record-settling pilot.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Yo, Adrian!

Wine bottle sculpture with a ship's stateroom inside.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This impressive scene portrays the elusive forest giraffe of Central Africa.

This tiny patch of arid sand sits in one of the greenest states in the United States.

Abandoned Italianate architecture on the coast of Maine.

A serene plaza that commemorates one of the Granite State's most iconic figures.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

The summit Roosevelt conquered before he descended to become The Chief.

This exhibit is one of the largest and most well-preserved collections of Jurassic-era trackways in the United States.

A single room pays homage to the prodigious achievements of the 30th President of the United States.

Mass Grave of 48 colonists killed in a raid by Native Americans and the French in 1704.

Step back in time on this preserved 1800s farm.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

An abandoned coal mine reached by a steep hike.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

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