Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

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

This peaceful gem in upstate New York was chosen as the future home of the 14th Dalai Lama's Library and Museum.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

The library of every book lover's dreams.

An abandoned asylum where patients have been forgotten but their possessions remain.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

A historic recreation of the golden age of the Erie Canal, abandoned for some time, slowly being restored.

Possibly the smallest church in the world floats in the middle of a pond.

This Art Deco fortress in upstate New York gives Manhattan's vaunted examples of the style a run for their money.

A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.

A Frankenstein blend of science and art allows one tree to produce 40 different types of stone fruit.

The final resting place of Harriet Tubman and other famous historical figures.

These locks on North America’s oldest canal are named after a porcine rock formation.

A fake block of cheese remembers a feat of dairy engineering from the Chicago World's Fair.

The purported world's shortest international bridge connects a homeowner in Canada to his backyard in New York.

This tiny little island has, as the name says, just enough room for its single house.

A castle built for love, and abandoned due to heartbreak.

Secluded amid upstate New York’s Adirondack Mountains lies this subterranean emblem of a nation on the brink of nuclear war. And it's for sale.

This folk art dinosaur was almost pushed to extinction due to lack of a building permit.

A gardener's enduring labor of love is spread throughout a small Vermont town.

Driftwood dinosaurs lurk within trees covered in a rainbow array of avian abodes.