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.

The largest museum dedicated to Italian Americans on the East Coast is located in a 100-year-old church.

The final resting place of President Chester A. Arthur and hundreds of others from Revolutionary War soldiers to poets, politicians, and painters.

This stained glass window designed by Tiffany Studios is hidden behind the circulation desk of a public library.

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

A one-ton statue of Steve Rogers beautifies the entry to a Brooklyn Bed, Bath & Beyond.

A Ukrainian church canteen doles out hearty fare in an East Village basement.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

A notorious punk house turned co-op.

This small and serene place for quiet reflection on Staten Island was built in China based on the gardens of the Ming Dynasty.

The oldest living tree in Manhattan comes shrouded in sinister legend.

This enormous Hindu temple in Queens serves incredible dosas in its basement canteen.

New York City's smallest piece of private property.

A hands-on traveling collection of the innovative devices of yesteryear.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Thousands of bottles that have held everything from poison to perfume make up the collection of this small museum.

Hiroshima survivor on Riverside Drive.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

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

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

Glacial erratic or man-made dolmen? It probably wasn't druids.

This roadside attraction attracts kids with dinosaurs before blindsiding them with geology.