This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

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

Thousands of crosses and markers for soldiers who lost their lives in Iraq and Afghanistan blanket a California hillside.

The newsstand that never closes its doors—well, almost never.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

A 300-ship graveyard, with a few still visible at low tide.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.