Elevated freight railway turned wildly successful urban park.

The first piece of public art dedicated to LGBT rights.

New York City's smallest piece of private property.

This slender three-story building has also had several famous residents.

Salute the leader of the proletariat.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

A celebration of capitalism in Midtown.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

A "haunted" landmark on the coast of Southern California.

This ultra-modern home clings to the slope of the Hollywood Hills on a precarious stilt.

The seat of Buffalo government is a gorgeous Art Deco palace.

The absurd creation is a compulsory destination for selfies in Buffalo.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

A prime example of New Orleans' unique architecture these early 20th century homes were built to look like steamboats.

Train fans from all over flock to this railroad viewing park where three lines converge.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

You can get anything you want at the former site of the restaurant immortalized by Arlo Guthrie.

Toxic waste disaster that founded the Superfund program.