The world's longest known cave system.

The real-life site of Ichabod Crane's infamous gourd attack.

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

The site of a tragic massacre that spawned a multimedia franchise.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

A natural gas leak provides a flickering flame beneath a waterfall.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

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

There must be a pun in this haystack somewhere...

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

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

The first and only carousel with a lineup entirely of insects.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A celebration of capitalism in Midtown.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

The "Seinfeld" diner.

A dilapidated dock tells the story of Titanic's missed arrival.

This elaborate towering structure was once famed for its revolutionary height.

This restaurant offers a side of antiques, curios, and a bathroom chock full of owls.