We took the trolley from Embarcadero to Balboa Park, out to Coronado Island, down past Petco Park, walked through sea harbor village and took in drinks and bites to eat at the Gaslamp Quarter. Also spent the day at the zoo and got a ride back to our hotel. We never needed a rental car to see the things on our San Diego bucket list so this was a fantastic choice for our vacation. A touch pricey but with the cute driver (bring cash for their gratuity!) and their vast knowledge of the city and ability to make people from varied backgrounds and locations laugh, sing, and enjoy the ride you'll still feel the value is there.