A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

Edison's cast-in-place concrete houses were a failure, but way ahead of their time.

A wooden theatre that remains the heart of a charming Victorian-era New Jersey enclave.

Just outside the Ohio Supreme Court sits a testament to justice.

This whimsical campus lawn is dotted with large sculpted numbers and hidden mathematical formulas.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

An Orlando museum houses the world’s most comprehensive collection of work by Louis Comfort Tiffany.

This Masonic lodge was the first major private building to be constructed in Washington, D.C. after the Civil War.

Over the last century, this elegant columned facade has been home to the headquarters of a bank, several nightclubs, and a restaurant.

This unassuming passageway played a key role in one of the most important events in U.S. history.

This humble star-gazing center touts itself as the "Birthplace of American Astronomy."

The neighborhood surrounding the memorial was the epicenter of the AIDS epidemic in Louisiana.

Taxidermied cartoon heads, unseen illustrations, and famous characters all reside in this small gallery space.

In 1857, the Mardi Gras parade tradition began at this intersection.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

This residential door allows San Francisco muggles a glimpse at the wizarding world.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The first fresco Diego Rivera painted in the United States can be found in the former San Francisco Stock Exchange.

Only hotel where you can legally launder money.

This antique shop specializes in the history of print and design.

The only visible piece of San Francisco's most famous shipwreck.

The historic building's ornate stained glass fixture has survived the devastating 1906 earthquake, ensuing fires, and multiple redevelopment attempts.