San Francisco, CA, California, Aerial, airplane flying over San Francisco Bay Area

San Francisco, Chinatown, Bay Area, California, Street scene in Chinatown in San Francisco in the state of California.

San Francisco, aerial, fog, Bay Area, California, Aerial view of San Francisco Bay and downtown San Francisco in the state of California.

San Francisco, outdoor cafe, Fisherman' Wharf, Bay Area, California, Pier 39 on Fisherman's Wharf in San Francisco in the state of California. Skyline of downtown San Francisco in the distance.

San Francisco Bay Area, CA, California, Aerial, wing, airplane flying over Don Edwards National Wildlife Refuge

San Francisco, Fisherman's Wharf, Pier 39, Bay Area, California, Pier 39 on Fisherman's Wharf in downtown San Francisco in the state of California.

San Francisco, California, Bay Area, Palace of Fine Arts housing the Exploratorium in San Francisco in the state of California.

San Francisco, Bay Area, California, Bay Cruise and Ferry Terminal at Pier 41 on the waterfront in San Francisco in the state of California.

San Francisco, Bay Area, California, Columbus statue in front of the Coit Tower on Telegraph Hill in San Francisco in the state of California.

The Golden Gate Bridge, San Francisco, San Francisco Bay, Pacific Ocean, California, The Golden Gate Bridge of San Francisco at sunrise, the longest single-span suspension bridges ever built, in the state of California.

Golden Gate, San Francisco, The Golden Gate Bridge, bridge, California, Pacific Ocean, San Francisco Bay, The Golden Gate Bridge of San Francisco, the longest single-span suspension bridges ever built, in the state of California.

San Francisco, The Golden Gate Bridge, California, The Golden Gate Bridge of San Francisco in heavy fog over the San Francisco Bay, the longest single-span suspension bridges ever built, in the state of California.

San Francisco, Bay Area, California, Marina on the harbor in San Francisco in the state of California. Skyline of downtown San Francisco in the distance.