Simi Valley sits in Ventura County, surrounded by the Simi Hills and close to Los Angeles. The Ronald Reagan Presidential Library and Museum, on a hilltop above the valley, presents exhibits on the presidency, a replica Oval Office, and an Air Force One pavilion. Strathearn Historical Park preserves early Simi Valley homes and farm buildings, telling the story of the valley's ranching past. Corriganville Park, a former movie ranch, offers trails through sandstone formations where many western films were made. The city mixes suburban neighborhoods with open hills and history.