Once in a state of dilapidation, this candy-inspired fortress is now being revived.

New England's tallest light house stands on an island with a history of cannibalism and death.

The only remaining historic maritime signal station in the United States.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

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

Expertly restored pinball machines as far as the eye can see.

Row, row, row your pumpkin quickly down the stream.

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

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

This historic mini-suspension bridge was swept away once but is now here to stay.

The ghost town that was one of New Hampshire's first settlements now exists as a park detailing its history.

A former zoo turned public park, where visitors can hang out in the old animal cages.

This humble resting place belongs to one of history's most celebrated restaurateurs.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

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

This 150 foot seven-tiered cascading waterfall is one of the hidden gems of the White Mountains.

A small chapel celebrating the spiritual bond between dogs and humans.

Designed as a place for patients to take in the scenery, this tower has a dark history.

Not one, but two of Frank Lloyd Wright's architectural masterpieces nestled on the same street.

A beautiful, creepy 19th-century castle stands incongruous in rural Vermont.

A 60-foot-tall tower provides unparalleled views of the southern Green Mountains.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

A restored historic movie theater is the perfect place for a regional film archive.

The world's first hotel built in an abandoned water-filled quarry.