A strange, heartwarming, decades-old declaration of love on a New Hampshire roadside.

The oldest covered railroad bridge still standing in the United States.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

Stone monument honoring a town founder has a witch-boot shaped stain and a curse to go with it.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

This 19th century granite fortification is one of the most well preserved forts in New England.

A rare opportunity to drive across the ocean floor.

A small Canadian town founded as a refuge for Loyalists following American Independence.

The largest axe on the planet contains a time capsule that seems like it may never be discovered.

The massive Roman arch in New Hampshire that was meant to be a tomb.

Maybe the only missile installed in a public park, this Cold War leftover was one of the first to carry a nuclear warhead.

This collection honors the iconic, and proudly American lighter that just won't quit.

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

This jail which was in service for over a century is now open for curious visitors.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

A field of nothing but boulders which resembles a giant's gravel driveway.

The little-known final resting place of one of America's greatest writers.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

A cable-suspension footbridge that hangs high above the Mill River.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

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

This cavernous abandoned marble mine is popular with ice skaters in the winter.

Five mythical trolls have taken up residence in woods and hidden on paths at the Coastal Maine Botanical Gardens.