San Francisco covers the tip of a 50km (30mi) peninsula in Northern California, with the Pacific Ocean on its western side and the San Francisco Bay to the north and east. San Francisco is just one of many cities in the Bay Area; the cities include Oakland, Berkeley, and San Jose, Marin County and the Wine Country lie to the north, just across the Golden Gate Bridge. San Francisco also has approximately 791,600 residents The easiest way to travel around San Francisco's is on foot. A stroll through North Beach, with its relaxed European charm, leads straight into bustling Chinatown. A hike up Nob Hill takes you down to the Tenderloin. South of Market, the fast paced warehouse district during the day, turns into Club central at night. The Mission District with its continuous flow of hip youth has changed many of the district's streets. The Castro was claimed by gay men in the 1970s, and it remains gay to this today, projecting an assured, almost mainstream air.