Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

The "lovely red Vega" of the legendary record-settling pilot.

The site of the climactic scene from the classic horror film is now a historic landmark.

One part antique store, one part curiosities hodge-podge.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Golden Gate Park's historic collection of plants.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

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

Noble beasts perhaps, but not the Emperor's dogs.

One of few lasting examples of the brief octagon craze that developed into folly.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.

Alleyway plaque commemorating the death of a fictional character in The Maltese Falcon, not far from the author's home.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

Three hundred years of preserved Spanish colonial history in San Antonio.

Continuing the tradition of the dime museum in style.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

A mysterious air force base built to resemble a Long Island fishing village.

At 207 feet, one of the world's longest continuous escalators.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.