The 100-year-old public collection of a New Hampshire dentist that contains taxidermy, Native American artifacts, and a pair of mummy hands.

A very big rock just plopped down in the New England woods.

These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

Lake Champlain Bridge, the recently demolished and rebuilt bridge where they filmed "What Lies Beneath".

Teddy Roosevelt’s famous “midnight ride to the presidency" started at this small lake high up in the Adirondacks.

A natural gas leak provides a flickering flame beneath a waterfall.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

A once grand hotel is being retaken by the wilderness it once capitalized on.

A peaceful international sculpture garden in upstate New York.

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

Three acres of mythology-inspired sculptures are visible from the highway.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

An abandoned 19th century quarry in the middle of the woods, remade by unnamed wanderers into a massive series of rock thrones.

Homemade rockets, dinosaurs, and robots make this New York small business much more than a furniture store.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

This disastrous New Jersey safari park saw animal attacks, escapes, and disease before being abandoned.

A winding, cliffside stretch of road overlooking the Delaware River.

Mysterious rocks that ring musically when struck.

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

This huge, disused viaduct is now a crumbling concrete underworld of covered in years of graffiti.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.