A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

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

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

Try not to get slimed in Tribeca.

Unusual books about food and drink abound in this 19th-century New York townhouse.

The oldest living tree in Manhattan comes shrouded in sinister legend.

An aptly-named street near the birthplace of the modern LGBT rights movement.

New York City's smallest piece of private property.

This slender three-story building has also had several famous residents.

Phil Mortillaro uses keys to bring art back to the Village.

Rummage through this sunken ship, but leave your scuba gear at home.

A dilapidated dock tells the story of Titanic's missed arrival.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

Before Nixon, "watergate" meant canals.

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

The span is crooked and made from two older recycled bridges.

This forgotten boat elevator was an engineering marvel in its heyday.

The last street in Pittsburgh that's paved with wood.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.