Concrete strongholds stand guard over the Golden Gate.

Ride on a fully-restored Nike nuclear-tipped missile elevator from the Cold War.

This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

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.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

This brilliant display of whirling fireballs celebrates Hogmanay.

A cablecar-station-turned-revolving restaurant with 360-degree views of the Swiss skyline.

The second-highest train station in Europe.

Though illegal, city officials have made an exception for this work of art.

Once America's tallest structure, now a Baltimore landmark.

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

This 16-foot, intricately detailed model of the Gearing-class destroyer has been called the most detailed model ship ever built.

This statue honors the author's groundbreaking family story.

A "Texanic" (gigantic Texas) collection of Art Deco architecture at Dallas' historic Fair Park.

A mythical chimera first sculpted in 1936 as a mix of the main animals of Texas livestock.

This kitschy curio wonderland is full of fake animals, teak tables, and a cacophony of random bric-a-brac.

Meet manatees face-to-face at this zoo for native species.

This museum honors the composer of “Swannee Ribber.”

A thriving Black community was destroyed by an angry white mob at this site in 1923.

Where manatees are the snowbird vacationers in these balmy Florida springs.

Public works and national defense project meant to carve a canal all the way across the state of Florida.

The scuba diving training facility was named for the steam that rises from the cave's chimney.