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

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

Elevated freight railway turned wildly successful urban park.

A crumbling hospital from the 1850s on Roosevelt Island.

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

An artist's cute bronze subway sculptures belie his violent artistic past.

One of only two commuter aerial tramways in the United States.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

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

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

Established in 1937, the oldest candy shop in New York City boasts a rainbow-colored inventory that would make Willy Wonka envious.

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

The competition: breathe deeply as long as you can.

Prove you deserve to be fed by Kenny Shopsin.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

Browse an impressive collection of passenger and military aircraft dating back to World War II.

Hikers and walkers flock to this historic volcanic butte for its scenic desert views.

This small hill features the most notable collection of petroglyphs in Saguaro National Park.

A colony of Mexican free-tailed bats live under the bridge and take flight at sundown all summer long.

Previously a hot spring, this park remains a site of unique history, wildlife, and geology.

This church on a Tohono O'Odham reservation has stood since 1797.

You must take the A train... to the last active cemetery in Manhattan.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.