Mission Viejo is as beautiful as its name. This flourishing Orange County city in sunny California has a picture-perfect landscape and plenty of enjoyable activities year-round. There is something for everyone in the vicinity of Mission Viejo, from art galleries to whale watching. Mission Viejo was ranked the safest city in California and is mostly residential. The clean, tree-lined streets contribute to its charm, and it is easy for time to fly by exploring what it has to offer.