The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

The arch that celebrated the completion of the Lincoln and Victory highways.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

The "Seinfeld" diner.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Elevated freight railway turned wildly successful urban park.

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

The first piece of public art dedicated to LGBT rights.

A reminder to choose water over wine since 1888.

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

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

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

The only home of the famous French impressionist painter open to the public is now a museum and bed and breakfast.

The only rotating bar in New Orleans has been slowly spinning since 1949.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

The first memorial dedicated solely to the Black troops who fought for the Union.

An overlooked memorial honoring the local Washington residents who died in World War I.

There’s a hidden military meme engraved on the World War II Memorial.