This Colorado hiking trail provides a small gold mine of abandoned gold mines.

These mysterious petroglyphs in Vermont reflect a troubled history in the treatment of Native American culture.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

One of the oldest cemeteries in Vermont is the final resting place of soldiers, politicians, and a famous author.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

An obelisk marks the farmhouse where the founder of Mormonism was born.

A classic roadside attraction on Vermont's historic Route 5.

The monument dedicated to Phineas Gage in the town where his accident happened.

This charming woodland trail is peppered with poetry.

The world’s largest underground marble quarry is hiding in Vermont.

A gardener's enduring labor of love is spread throughout a small Vermont town.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

The “Grand Canyon of Maine” is a three-mile gorge full of striking geological features.

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

Friction between grains of sand cause a curious "singing" sound.

This petite park lets visitors see and touch examples of fossilized dinosaur tracks.

An abandoned Depression-era zoo hidden just off the highway.

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

A lone tower rises above the cliffs in a city park, offering fantastic views of the Connecticut landscape.

Ruins of a historic medical facility sits eerily by the water.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.