Old Mission San Luis Rey at 4050 Mission Ave., Oceanside (760-757-3651) is known as the King of the Missions. It is the largest of the 21 missions that flourished here in the 1700s and 1800s. It’s the majestic jewel of early California history. The museum is open daily 10 a.m.–4:30 p.m. Prices for self-guided tours… Read more »