A towering, steel behemoth that has graced the skyline of Lakeland, Florida since the early 1980s.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

The life of one of FDR's possible mistresses is preserved in her palatial Hudson Valley mansion.

A small Second Empire-style building is one of only seven remaining lighthouses on the Hudson River.

Home to a dizzying array of letterpress blocks with a rich history.

This giant boulder is sandwiched between apartment complexes in upper Manhattan.

You must take the A train... to the last active cemetery in Manhattan.

Harlem park dedicated to compulsive hoarders killed by their own junk.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

This Dutch Colonial home is the oldest remaining farmhouse in Manhattan.

Cryptic messages embedded in the New York City sidewalk.

The first museum in the United States dedicated entirely to posters.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

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

These unusual paintings give thanks to the saints and deities who granted people favors and miracles.

One of the best examples of Modernist religious architecture in Mexico City.

The house is an iconic pilgrimage site for fans of the Illinois-based emo band.

Why have you never heard of the second most popular tourist site in New York?

Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

Celebrating an art form with a collection of puppets from all over the world.

This abandoned neighborhood is now a park filled with beautiful trees, wildflowers, and hints of its past.

An eccentric inventor's castle home with its own indoor weather system.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.