Hidden inside a gift shop that doubles as a museum, this gargantuan yo-yo can only be operated by crane.

Home of what was the largest hydraulic mine in the world, producing gold and the first diamonds in the U.S.

This 19th century hydroelectric powerhouse was the first of its kind.

A working miniature city designed to teach kids about safety and presumably city planning.

The capitol city's oldest existing cemetery.

The only standing town in the United States that early Chinese Americans built for themselves.

A plaque and memorabilia collection mark where A&W got its start.

This 19th century train workshop is a treasure trove of railroad history.

Art Deco stylings conceal the true nature of this bridge.

I Street Bridge is the heaviest swinging center bridge in the United States.

A replica of the first public theater built in California.

The California capital city once stood 10 feet lower than it does today.

This 15-story mural celebrates the 50th anniversary of the musician's iconic "At Folsom Prison" album.

The last of a gourmet supermarket chain, this store helped spark California's Food Revolution.

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

An architectural experiment in the Lower Ninth Ward, this row house is capable of floating as high as the Katrina floodwaters.

A serene but haunting memorial to protective wetland lost, the absence of which directly damaged the Lower 9th Ward following Hurricane Katrina.

A prime example of New Orleans' unique architecture these early 20th century homes were built to look like steamboats.

A house of courtship where the Jazz Age's most storied lovers got their start.

The legend of a local monster still haunts this small town.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The final resting place of New Orleans' most famous voodoo priestess.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.