From the Golden Gate Bridge to Alcatraz, the San Francisco Bay is home to a handful of world-famous landmarks. Beachfront digs along its roughly 550 square miles of water are coveted, naturally, but those with grand scale and architectural distinction are even rarer.
La Casa Dei Quattro (which translates to the House of Four Horizons) in the small yet upscale town of Tiburon, Calif., is a combination of both, in a visually striking abode that leads directly onto a private beach…

