Try not to get slimed in Tribeca.

Elevated freight railway turned wildly successful urban park.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A crumbling hospital from the 1850s on Roosevelt Island.

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

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

The very first subway station in New York City is beautiful, decked out in chandeliers, and ... abandoned?

Iconic Los Angeles residence famous for its 19 statues of Michelangelo's David.

In the middle of the desert, miles from any human life, sat an anomalous pay phone that still magically answers your calls.

A newspaper building that made radio history.

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

A B-17 bomber stands as a memorial to the residents of Tulare County who served in World War II.

Sports history, made in the Arroyo Seco.

The oldest orange tree in California spawned a generation of citrus farmers.

A Community Cornerstone.

Apartment building was once posh playground to the Hollywood elite.

It would be a crime to miss it.

The cluster of boulders near Fort Irwin is covered in military insignia.

Thousands of turbines whir at the origin of North American wind power.

A 50-foot tile mural mosaic for the 100-year anniversary of the Statue of Liberty.

A giant desert bird that once swung music fans at Coachella now has a home in a nearby traffic circle.

The world’s largest concentrated solar plant generates as many problems as megawatts.

This monster board rode a monster wave to break two world records.

One of the largest fleets of armored vehicles in the world, sitting out in the California desert.