The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

There are owls with glowing eyes in Herald Square.

A bit of retro transportation flair preserved in the world's largest department store.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The "Seinfeld" diner.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

Visit the monolithic tomb of America's most famous general.

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.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

This "Palace of Purification" has made many film appearances as a dark and sinister headquarters.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

This dramatic rail curve was once the target of a failed Nazi attack.

Memorializing an American tragedy of massive proportions.

Steepest flood safety railway in the entire world.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

A retrofuturistic art installation in the Pittsburgh Airport.

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

These disused steel furnaces are now haunting ruins that may one day be a national park.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

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