SAN DIEGO, CA. April 4,- Fiesta Island on San Diego's Mission Bay is the City's "sandbox." This drone view looks south at the north end of Fiesta Island, which has a federally protected least tern nesting site, the oblong sandy spot surrounded by the perimeter road. The mostly undeveloped island is the home of Over The Line, Youth aquatic programs, a personal watercraft area, an off-leash dog haven, bicycling, nature preserves, campfires and more. PHOTO/JOHN GIBBINS Staff Photographer San Diego Union-Tribune.