Travelers are voting Griffith Observatory, Mount Wilson Observatory and Stony Ridge Observatory as the best of 3 observatories in Hacienda Heights. There are 1 observatory in Santa Monica a city just 30 km from Hacienda Heights and 2 observatories in Sherman Oaks which is 30 km distant. The most popular of these are Griffith Observatory in Santa Monica and Mount Wilson Observatory in Sherman Oaks. You can find 19 observatories in California and 231 observatories in the country of United States. Our members favorite in California is Chabot Space And Science Center and Griffith Observatory is the top pick in United States. Want more? Check out our map of observatories in Hacienda Heights.