Educational foundation that teaches the powers of fourth dimensional physical properties.

Where there's quartz, there must be gold. Thus is the story of the mines of Julian, and the titillating times of the Gold Rush.

A winding path built in secret on the edge of the continent.

Medical and zoological curiosities for sale.

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

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

The oldest standing structure in downtown San Diego.

This little blue house pokes out over the campus of UC San Diego, seven stories high.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.