Mentioned by oldtown-inn.com
San Diego Theme Parks - Belmont, Legoland, & More
"Comprising 1,200 acres in San Diego, Balboa Park is the largest urban cultural park in the United States, and also one of the oldest. It features over 15 museums, meandering paths, overflowing gardens, green belts, several theaters, gift shops, restaurants, a carousel, mini railroad, and San Diego Zoo. Admittance to the park is free, as is access to the luscious gardens, trails, The Botanical Building, and Timken Art Museum."