El Cerrito Heights, Rolando, Rolando Park, Redwood Village, Oak Park and Webster are neighborhoods that make up the Eastern Area. El Cerrito Heights is a hilly neighborhood that predominantly contains single-family homes with some multi-family development along El Cajon Boulevard and University Avenue, which are the main east-west corridors in the Eastern Area. The rolling hills of Rolando and Rolando Park are among the more recently developed neighborhoods of Mid-City, with Rolando developing prior to World War II and Roland Park in the mid-1950s. Both are predominantly single-family homes along curving streets, with some multi-family near the strip commercial development along El Cajon Boulevard and University Avenue. Darnall, Oak Park and Webster are neighborhoods that are predominantly single-family homes, but also include large multi-family complexes and a mobile home park both in Oak Park and in Webster. Oak Park is home to Chollas Lake Park.