New York's oldest concrete structure is being preserved thanks to the gentrification of Whole Foods.

This interactive gallery makes you feel like you've stepped into a fantasy world filled with whimsical monsters.

Detailed facade of a brownstone in Boerum Hill.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

The first piece of public art dedicated to LGBT rights.

Those belting out show tunes in this West Village piano bar might not realize it marks the site where Thomas Paine died in 1809.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

A beautiful oddities shop crammed with strange and morbid curiosities.

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

Located inside a former bread factory, this museum explores a century of transportation history through innovations that were extraordinary or failures—sometimes both.

This little museum in the town where zombies were born celebrates the living dead.

The Pennsylvania shopping center was once the setting for the 1978 film, "Dawn of the Dead."

A quirky collection of outsider art made from automobile parts.

Ruins of a once-prized railroad station in New York.

A forsaken wonder in the middle of the East Side neighborhood.

The absurd creation is a compulsory destination for selfies in Buffalo.

This restored house is like a time capsule of the president's unconventional inauguration.

The seat of Buffalo government is a gorgeous Art Deco palace.

A 19th-century architectural wonder designed by the "father of the skyscraper."

When oil was discovered just outside of Pittsburgh, the city became home to this regional stock market.