The site of the deadly Triangle Shirtwaist Factory Fire.

The East Village tenement from the cover of Led Zeppelin’s 1975 album has a tea shop on the ground floor.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

A reminder to choose water over wine since 1888.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

The oldest Dutch colonial stone house in New York City is a hidden gem on the border of Brooklyn and Queens.

This Queens beer hall preserves a German culture and language that is all but lost.

This Annapolis home was built by one of the signers of the Declaration of Independence.

Not all airplanes are found in hangars or on runways, but this wayward fuselage seems out of place in its odd rural resting place.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

This 19th-century outhouse has been recognized as a historic site.

Just outside Chicago, one of the few traditional Mongolian restaurants in the U.S. serves a misunderstood cuisine.

Over 1,000 pieces of one of the most niche art objects imaginable: the glass paperweight.

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

This free, take-a-book shop seems like a trick but isn't.

This lovely tree was a thank you gift from the man known as "Public Enemy No.1."

These vibrant row houses are a unique example of Baltimore kitsch.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

The location where the famed author and abolitionist began his journey to freedom.

Residing quietly in suburban Maryland, this tree has a star-powered history and was grown from a seed that journeyed to space on Apollo 14.

FDR's Art Deco hospital tower was hopelessly inefficient.

Louis Sullivan’s dark, swirling cast-iron designs envelop a popular department store in this Chicago landmark.