Santa Susana Park is a quiet park adjacent to the Santa Susana Railroad Depot in Simi Valley. There is a large play area, grassy picnic areas as well as a covered picnic area, restrooms and more. But of particular interest to my kid are the large sandstone rock formations they climbed into and onto. The park is located at 6503 Katherine Road, off of Kuehner. More information at www.rsrpd.org/simi_valley/parks/santa_susana_park.php.