Read a book next to a Midtown waterfall.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

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

An abandoned castle owned and ignored by Masons carries a cursed history.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

Elevated freight railway turned wildly successful urban park.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

New York's oldest magic store.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Tucked in the back of this amazing antique store is an important piece of medical history.

A crumbling hospital from the 1850s on Roosevelt Island.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A terrific purveyor of natural history objects and curios.

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

A World War II-era submarine is stuck in the mud in New Jersey.

Beautiful stained glass depictions of the history of human flight fill this surprising chapel.

This evocative New Jersey statue memoralizes the Polish victims of a Soviet massacre.

Seven golden statues rise into the sky from sculptor Victor Victori's New Jersey front lawn.

A recently abandoned psych ward at the end of Sanatorium Road.

These unassuming lighthouses have seen the first reading of the Pledge of Allegiance, the first wireless transmission, and more than one mystery.