The "Seinfeld" diner.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Expansive and colorful studio of Minneapolis art-star, Doug Padilla.

This secret gem of a toy store houses a rideable carousel populated with fantasy animals.

Abandoned Coast Artillery fort now serves as graffiti canvas and sightseeing vantage point.

The only surviving fragment of the lost Narragansett Pier Casino.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The oldest living organism in New York City. Maybe.

A unique collection of more than 250 rocks and minerals located on a university campus.

One of the first amphibian migration tunnels in the United States encourages a tradition that has inspired Amherst residents for decades.

Antique gaffe kept in the basement of a small Vermont natural history museum.

These mysterious petroglyphs in Vermont reflect a troubled history in the treatment of Native American culture.

An architectural statement of artistic intent smack in the middle of Providence, Rhode Island's Colonial uniformity.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

An unusual library of dead things at the Rhode Island School of Design.

The site of the Andover Witch Hunts, which ended with more witch accusations and arrests than Salem.

This museum in San Francisco's Chinatown is one of the oldest and largest archives of Chinese American history and culture.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

The home of an antique carousel still in operation.

Explore the odd assortment of items that have washed up on the beaches of Plum Island.

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

The first neighborhood to implement the Garden City model in its suburban planning.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.