The San Francisco Bay Area, also known as the Bay Area, is split into 5 different regions. The East Bay, North Bay, San Francisco, Peninsula, and South Bay.
The East Bay is on the east side of the bay, and is famous for the major cities of Oakland and Berkeley, and is home to U.C. Berkeley.
The North Bay is the area immediately north of San Francisco, and accessed by the Golden Gate Bridge. It is most famous for Napa and Sonoma counties, and for its collection of wineries.
San Francisco is the largest and most famous city in the Bay Area. San Francisco is actually quite small, at roughly only 49 square miles (121 square kilometers). The city is famous for is beautiful views, fog, and delicious food.
The Peninsula is immediately south of San Francisco, and stretches down to Mountain View. Some of the more famous areas include San Mateo, Palo Alto, and Stanford. The southern part of the Peninsula includes the northern most part of Silicon Valley.
The South Bay is most famous for Silicon Valley and San Jose. Most of the famous tech companies are located in the South Bay, including Google and Apple, but there lately there has been a trend of companies relocating from the South Bay and Peninsula into San Francisco.
Climate in the Bay Area tends to be fairly mild. Snow seldom falls, and there are few heat waves throughout the year.
There are many public transportation services in the Bay Area to help commuters get around. The Bay Area has three international airports (SFO, OAK, SJC), six major bus agencies (AC Transit, Muni, SamTrans, VTA, Golden Gate Transit, County Connection), four rapid transit and regional rail systems including BART and Caltrain and two light rail systems (San Francisco Muni Metro and VTA Light-rail). There are also regional rail lines (Amtrak), and multiple public and private ferry services (notably Golden Gate Ferry, and Blue and Gold Fleet)
The freeway and highway system is extensive, but heavily congested during rush hour; especially the Golden Gate Bridge and the Bay Bridge)
There are seven bridges that connect the Bay area, The Richmond-San Rafael Bridge, The Golden Gate Bridge, The Bay Bridge, The San Mateo Bridge, The Dumbarton Bridge, The Carquinez Bridge, and The Benicia-Martinez Bridge.