A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

Visitors to this arboretum are greeted by three smiling giants crafted from sustainable materials.

One man's quest to save his town with a trail of record-breaking sculptures.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

This tower commemorates the spot where George Washington hoisted the Grand Union flag.

Around 160 years ago, this spot marked the location of a wharf along the shores of the Charles River.

The nation's second-ever First Lady urged the founding fathers to "remember the ladies."

Whimsical cookie-themed plaques mark the birthplace of the Fig Newton.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

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

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

This small shop walked so America could run on Dunkin'.

The homestead of American patriot John Adams.

Beautiful steampunk ghosts of early Massachusetts.

The only working large-scale tea plantation in the United States.

A replica that won't float away.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

The ruins of Theodore Roosevelt's beloved ranch stand in a forgotten corner of a national park named after him.

A creek tumbles over a series of step-like rocks to create this scenic water feature.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

The oldest badlands in North America, Makoshika State Park takes it name from the Lakota words for broken land.

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

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.