The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

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

The stoic structure boasts a whimsical set of stained glass art commemorating Lewis Carroll.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Backwards hour and minute hands and a timing mechanism that fluctuates with the temperature led to this clock tower's local nickname.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

Frank Lloyd Wright died a year before construction on his largest public project even began.

George Lucas donated this park to honor the birthplace of his two biggest movie franchises.

Law-protected wreckage serves as a peculiar memorial for an almost forgotten World War II tragedy.

At night, a grove of towering redwood trees growing through the pavement block out all light from the so-called “Dark Park” of Madrone Avenue.

One of the last remaining Carpenter Gothic churches is situated on a wildflower conservatory overlooking the bay.

An abandoned, unfinished mansion on grounds strewn with lava rocks.

A living time capsule of the 1960s Richardson Bay water-front.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

Internationally-recognized arts center housed in a century-old former military barracks.

Concrete strongholds stand guard over the Golden Gate.

This abandoned boat was left in place thanks to its rotting beauty.

'Cause the fence start shaking, the earth was quaking.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

One of the few authentic Japanese gardens in the state of Indiana and perhaps the most peaceful place in the city of Mishawaka.

This museum collects over a century of automobile history including the iconic car from The Muppet Movie.

A century and a half of research in the sciences and natural history, still going strong.