Mysterious meeting place for UFO hunters near Area 51.

A Mysterious Masonic tomb in San Luis Obispo.

California's oldest wind harp represents a historic piece of America's Danish history.

A collection of haunted objects and macabre oddities under one roof.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

A roadside collection of over-sized iron creations that are a bit more macabre than most.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

South Dakota's oldest operating brewery is housed inside a historic firehouse.