San Francisco's Sea Cliff neighborhood, where Twitter CEO Jack Dorsey owns $30 million worth of homes, is a parade of oceanside mansions. Here's what it's like inside.

Katie Canales/Business Insider On the northwest corner of San Francisco is the exclusive neighborhood of Sea Cliff. It was founded in 1913 as one of the city's residence parks, or makeshift suburbs. It's become one of San Francisco's most elite residential areas housing prominent figures, including Twitter and Square founder and billionaire Jack Dorsey. Visit Business Insider's homepage for more stories. If you need a reminder of San Francisco's multifaceted landscape, go to Sea Cliff. As the na...