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

Even Henry David Thoreau found this glacial pothole irresistible.

A short nature trail winds through the greatest works of poet Robert Frost.

Around 100 sculptures from artists all over the world decorate the hiking trails surrounding this locale.

According to legend, Bob Dylan sneaks in twice a year to eat dinner with Jack.

The Mysterious Witch Bonney, a haunted statue in an old industrial city.

Supposed Massachusetts Grave of a pre-Columbus Knight Templar.

The birth home of one of cinema's legendary actresses.

Every December the Wannalancit Mills lights a Christmas Tree over the old mill's smokestack.

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

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

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

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

A stone memorial erected for New Hampshire's only convicted witch.

A natural tidal swimming pool is ringed by bizarrely artistic lava rock formations.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

Ruins of a German Castle on top of a towering stone pillar.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

This historic national park is covered in the stunning ruins of red rock pueblos.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

The bears may be gone, but their old cages can still be found.

The world's biggest pet store.

An industrial relic is now one of Europe's most staggering art spaces.

This massive steel pyramid can be entered by a set of jagged steps that let visitors stand in its heart.