From this desk Al Hirschfeld drew his influential caricatures of the 20th century's Broadway stars.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

Once considered the height of medical modernity, this structure is now the oldest remaining component of Roosevelt Hospital.

This translucent sculpture represents a quintessential component of New York City's skyline.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

The first museum in the United States dedicated entirely to posters.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Where the legendary Orson Welles got his theatrical start before "Citizen Kane."

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

Here be dragons.

Creating this diorama spurred naturalist Carl Akeley to begin advocating to protect the apes.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Rummage through this sunken ship, but leave your scuba gear at home.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

Illegal drag racing two stories beneath Chicago’s streets.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Hiroshima survivor on Riverside Drive.

When the town wouldn't allow the fast-food behemoth to build a new restaurant, they put one inside an 1850 home.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."