1. Explore Balboa Park: This 1,200-acre urban cultural park features a variety of gardens, museums, theaters, and other attractions, including the San Diego Zoo, the San Diego Museum of Art, and the Old Globe Theatre.
2. Visit the Gaslamp Quarter: This historic district is known for its Victorian architecture, lively atmosphere, and many shops, restaurants, and bars.
3. Take a walk or bike ride along the Embarcadero: This scenic waterfront area offers stunning views of the bay and the Coronado Bridge.
4. Visit the USS Midway Museum: This retired aircraft carrier is now a museum that offers a glimpse into naval history.
5. Spend a day at the beach: San Diego is home to some of the best beaches in California, including Mission Beach, Pacific Beach, and La Jolla Shores.
6. Explore the tide pools at Cabrillo National Monument: This park offers a chance to see a variety of marine life, including sea stars, anemones, and sea urchins.
7. Visit the San Diego Zoo Safari Park: This 1,800-acre park is home to a variety of African and Asian animals, including lions, elephants, giraffes, and zebras.
8. Take a ferry to Coronado Island: This island is home to beautiful beaches, the historic Hotel del Coronado, and the Coronado Ferry Landing, which offers a variety of shops and restaurants.
9. Visit SeaWorld San Diego: This marine park is home to a variety of sea creatures, including dolphins, whales, sea lions, and penguins.
10. Go hiking at Torrey Pines State Reserve: This park offers stunning views of the Pacific Ocean and is home to rare Torrey pine trees.
These are just a few of the many things you can do in San Diego. With so much to offer, it's easy to see why this city is a popular destination for both tourists and locals alike.