Historic marionette theater features thousands of handmade puppets and free cups of ice cream.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

A bit of retro transportation flair preserved in the world's largest department store.

A very classy 1920s-era bar right in Grand Central Station.

An unassuming secret door once led to a legendary watering hole.

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

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

A prohibition-style speakeasy takes up residence in the last Victorian residence in Hollywood.

A Prada store in the West Texas desert that is never open for business.

Nancy Thompson's Home from "A Nightmare on Elm Street."

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

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

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

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.

Try not to get slimed in Tribeca.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

The second oldest continuously operating bar in Louisiana.

A snapshot of the city's fascinating voodoo culture.

The world's most active stratovolcano is almost always erupting.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Thousands of well-dressed mummies below a monastery.