A man used his Civil War-era fortune to build this sanctuary in memory of his wife.

At this farm in upstate New York, the former president plotted his reelection campaign.

Hidden inside one of the world's most well-visited zoos is a secret plaque promising eternal life.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

The first and only carousel with a lineup entirely of insects.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

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

Elevated freight railway turned wildly successful urban park.

A macabre tour of Hollywood’s deadly history.

Raised illegally, Reggie now lives at the Los Angeles Zoo after authorities spent years tracking him down.

The blinking light atop the iconic landmark has been sending secret messages for decades.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

A three-story, three-dimensional hobo clown in a tutu welcomes CVS shoppers.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

The beautiful 1920 Pantages Theatre remains hidden just underneath the LA Downtown Jewelry Exchange.

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.

This traditional garden in the San Fernando Valley doubled for Star Fleet Academy, and is irrigated entirely by wastewater.

A ghost town at the airport is now a refuge for blue butterflies.

Historic funicular railway, believed to be the shortest railroad in the world.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.