Corona consists of a few different neighborhoods that are distinct in their own ways. Corona Hills is an affluent community featuring many huge homes and impressive views of the city. Downtown is the oldest part of the city with little shops to visit and history to learn about. South Corona is another affluent area that is all medium to high wealth suburban tract homes with many parks. El Cerrito is the poorer side of town, but still home to many huge mansions. Horsethief Canyon is all residential suburban homes. Green River is another affluent area that is the closest to Orange County.
The best ways to get into the city are through the 15, 91, and 71 freeways. Just follow the signs for it.
Like all of Southern California, the best way to get anywhere in this place is by car. The city is served by three freeways (15,91,71) and has many major streets to guide you through the city. Since Corona is in the LA metro area, traffic can get pretty bad, heading in all directions (east to Riverside, north to Ontario, west to LA/Orange County, and south to San Diego) The city is also served by a bus service and the Metrolink train.
Although generally a safe area, Corona has a few parts that should be avoided during certain times. The downtown area has a concentration of homeless people that should be avoided at night. Also, the community of El Cerrito, which isn't officially part of Corona, should also be avoided at night on foot. It consists of a single major road with many poverty stricken homes. However, both of these areas are perfectly safe when in a vehicle and are nothing compared to the nearby cities of Los Angeles, Riverside, and Anaheim.