Residents of this Brooklyn neighborhood may be unaware their houses sit atop a buried trolley graveyard.

A fire station-turned-church-turned-museum dedicated to the work of seminal light artist Dan Flavin.

Guerilla gardeners reclaimed this abandoned railroad land literally putting down roots.

The shared home of a utopian commune that practiced "free love" a century before the hippies.

You must take the A train... to the last active cemetery in Manhattan.

A living antique aviation museum in the historic town of Red Hook, New York.

Fossilized sea bottom and lime quarry.

This Catskills museum preserves stumps from the earliest known fossil forest on Earth.

One-time largest man-made structure in the world will be a park in 30 years.

Tucked away on the second floor of a small town library is one of the great private Victorian taxidermy collections looking today very much like it did in 1909.

Abandoned rock quarry now a haven for mountain bikers and hikers.

The site where Joe Gallo kept his guns, pet lion, and launched an all out mob war in 1960s Brooklyn.

The first and only American institution dedicated to the enduring value of comedy in the United States.

This impressive mansion in Vinegar Hill has some mysterious details in its architecture.

The studio of influential composer Charles Ives is perfectly reconstructed, hidden in the back of the American Academy of Arts and Letters.

Spies, love letters, and ghost stories have all left their mark on this home-cum-museum.

A memorial marks the library lobby where Langston Hughes' ashes are buried.

The schoolhouse where Jesse Merwin, the inspiration for the "The Legend of Sleepy Hollow" character, once taught.

Reforestation in action is the main attraction in this abandoned quarry.

A hamlet full of permanent Christmas spirit holds one of the earliest theme parks in the United States.

What remains of the simple red brick chapel where the women's rights movement began.

Whale bones, scrimshaw, and sperm oil make up just a part of this comprehensive collection of whaling history.

The second-largest (of only two in the world) large particle collider is the underdog of experimental physics.

Eight whimsical acres of metal art.