The oldest surviving synagogue in New York City is now a soaring art space.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

A celebration of capitalism in Midtown.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

Try not to get slimed in Tribeca.

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

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

Over a century old, this restored Victorian building is surrounded by a lush garden filled with rare palms.

These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Once part of a dam servicing an early 19th century grist mill, the tucked-way falls are a tricky-to-find urban oasis.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

This stone memorial pays tribute to a massive shipwreck which was sadly overshadowed by the death of John Wilkes Booth.

The early American colonists were such ferocious drinkers the law actually required every town to have a tavern.

Pennsylvania's own Roswell-style UFO mystery.

The smallest covered bridge in Maryland.

This picturesque stream was up until recently the site of a ten story mountain of slag and sewage.

Endless rows of boxes of paper records line the hallways of the archaic federal facility where guns are traced.

A larger-than-life statue of America's favorite sundae marks the place it was invented.

Extraordinary objects lurk in this quintessential regional museum.

It marks the spooky spot where the bodies of two young boys were found in the 19th century.

A natural spring situated on the grounds of the Hawthorne estate.

An abandoned stretch of highway, deteriorating next to the operational one.