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

Guarded by the Angel of Grief, the Stanford family tomb attracts an odd mix of halloween revelry and somber contemplation.

Hidden among the multi-million dollar mansions in the Santa Cruz hills is a sanctuary for troubled birds.

The largest permanent Monopoly board makes one of the longest games even bigger.

San Francisco Bay's ghost town.

If you are looking for a used Russian battery, Chinese Ham Radio or other electronic oddities this Flea Market is a good place to start.

Haunting and beautiful trees, doomed to die.

A 140-year-old castle with underground caves hidden in San Francisco.

Radioactivity still cause for concern at this urban explorer's paradise.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

The peaceful gravesite of a rugged wild west gunman echoes the touching story of his last days.

This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

A dry lake is what remains of a community founded on a real estate scam.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

America's smallest "national forest" has only 33 trees.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

A herd of 150 bison live on California's Santa Catalina Island and are at the heart of an ongoing debate between environmental protection and economic expansion.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

In the middle of the desert, miles from any human life, sat an anomalous pay phone that still magically answers your calls.

A humble garage, world-famous for being the epicenter of a technology revolution.