The first evidence of some of the Earth's earliest life was found in this fossilized undersea grotto.

A beautiful multicolored mound formed by the mineral deposits of the Orenda Spring.

This picturesque cottage was the site of Ulysses S. Grant’s final and perhaps most important campaign.

The Old Man of the Mountain’s less-famous, but still beloved little brother is said to resemble a leader of the Abenaki tribe.

A gas station and a state sign commemorating the most famous claims of extraterrestrial abduction.

Even Henry David Thoreau found this glacial pothole irresistible.

An old locomotive hides deep in the forest.

This store also houses a museum dedicated to the history of these small, historic community shops.

This smiling statue memorializes local cartoonist Bob Montana and his legendary creation.

Its unique collection details the history of the state's svelte railroads.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

Despite its extensive history, this fort saw little to no combat.

New Hampshire's first neighborhood is now preserved as a historic village with live action role players.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

The only one of New Hampshire's original 14 World War II watchtowers to survive in near-original condition.

A war memorial that appears to ascend from its forested setting.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

The original Uncle Sam was actually a New York meatpacker who is buried under this historic grave.

Rocky outcrops containing overhangs, caves, fissures, clefts, and alcoves that invite exploration and scrambling.

Constrained by time and topography, this civil engineering landmark was constructed 100 feet above Starrucca Creek over the course of a single year.

A museum dedicated to the history of electric interurban transit near the home of the first electric trolley system in the United States.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

Abandoned blast furnaces are an enduring reminder of Scranton's once booming iron business.