Residents of this Brooklyn neighborhood may be unaware their houses sit atop a buried trolley graveyard.

Every animal in the torah taxidermied and crammed into a Brooklyn townhouse.

This recently uncovered ad for Lindsay's run at Mayor in 1965 had been hiding for decades underneath a billboard.

Oldest surviving example of a Dutch saltbox frame house in America.

The preserved house of a jazz legend still echoes with his music.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

The last slot car racing arcade in Brooklyn is keeping the dream of speedy little autos alive.

I fought the law and the precinct caved in.

This seemingly unremarkable boulder is said to bear the hoofprint of the devil himself.

A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

A heartbreaking monument showing the last morning in the life of Jane Griffith.

Final resting place of the immigrant who brought artificial seltzer water to America.

A Collegiate Gothic quadrangle that surrounds an 18th century secondary school whose financing came from the likes of Alexander Hamilton and Aaron Burr, among others.

Records of the dead describe the myriad odd ways people used to die.

A way to take your secrets to someone else's grave.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

A curious friendship between two inanimate ladies.

One of only two remaining Victorian-era greenhouses in New York.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

A mass grave for victims of one of the city’s worst fires.

The boulder on which Alexander Hamilton laid his head as he died can still be visited on the New Jersey coast.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

A world of whimsy and wonder aboard a one of a kind historic landmark vessel.

Four cars from the old system were once on display, but were removed in 2014.