Balboa Park museums offer free general admission on a rotating basis throughout the month to thank residents for their continued support.
San Diego Natural History Museum Flagship museum focusing on the natural wonders of Baja and Southern California.
SD Model Railroad Museum Check out this great model railroad exhibit, featuring four scale-model railroad layouts of the SW.
Timken Museum of Art is filled wih European Old Masters, 18th/19th century paintings & Russian icons. This museum never charges admission.
Reuben Fleet Science Center Great fun for kids! The Fleet Museum features an IMAX Dome Theater, films and planetarium shows.