Monument to a forgotten NYC disaster that claimed the lives of 1,000.

The first piece of public art dedicated to LGBT rights.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

The site of the deadly Triangle Shirtwaist Factory Fire.

Salute the leader of the proletariat.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

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

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

This petite park lets visitors see and touch examples of fossilized dinosaur tracks.

This "thrice-cursed" island is allegedly home to Captain Kidd's lost treasure.

A New Hampshire grave with a grudge.

Come for the 14-foot-long taxidermy alligator. Stay for the mini costumed gators shooting pool.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

Taxidermied cartoon heads, unseen illustrations, and famous characters all reside in this small gallery space.

This strange, small castle on the bayou has withstood the test of time and weather.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

Rushing water plunges over a 100-foot drop created by an ancient lava flow at this majestic waterfall.

This rare, carefully curated collection showcases the history of neon inside a grandiose Elks lodge.

Home of Howard Hughes' Spruce Goose.

These machines have been collecting dust for decades.