Aquatica by Seaworld
A great way to beat the heat in San Diego, Knott's Soak City USA is a 32-acre water park located in Chula Vista, just outside San Diego. Water slides and other fun water attractions include the Balboa Bay wave pool, high-speed La Jolla Falls water slide, Sunset River, and the Tykes Trough kiddie slides. There are half a dozen fast-food stands throughout the park, and Eric's Beach Club Bar is open to adults over 21.
Address: 2052 Entertainment Circle (off Auto Park Drive), Chula Vista
Opening times: Opening hours vary by season, check the website for specific dates.
Admission: $32.99 adults, $22.99 children age 3-11. Discounted tickets are available through the website.