This freewheeling amusement ride is the last of its kind.

Harry Houdini plunged into the Charles River and performed one of his escape acts here in 1908.

This redwood is a historic landmark, a town’s namesake, and the dancing sideline symbol of Stanford University.

A gift to the children of Boston, this bronze bear represents playfulness, a spirit of love, and the warmth of big hugs.

The ghostly remains of an accidental sea.

This simple highway curve has become a comedic pilgrimage site.

The only Leonardo Da Vinci painting in the Western Hemisphere.

Dedicated to the neverending mathematical constant, this plaque next to a park bench was sponsored by an anonymous benefactor.

Enormous crabs, bioluminescent jellies, and other amazing creatures from the ocean’s depths—some of which are in an aquarium for the first time ever.

Dedicated to a colonial woman who was hanged for being a Quaker.

One of the oldest continuously-operated gay bars in the United States is allegedly haunted by Truman Capote and Tennessee Williams.

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls.

Where a demonstration led to equal rights for one of California's most marginalized communities.

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

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

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

The hulking remains of the Leesburg Lime Company Kiln lie dormant behind a historical marker close to the W&OD trail.

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

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

Art Deco stylings conceal the true nature of this bridge.

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

The capitol city's oldest existing cemetery.

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

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.