I think that this is a thing that you must do at SD.
With those Trolley tours you can see San Diego with different eyes.
They stop at every interesting place that SD has.
Also, to enjoy the riding, drivers are so nice and they do jokes all the time. It was really a funny time at the trolley.
You must see San Diego inside Old Town Trolley Tours.
It was a little expensive but it worth.
Doesn't matter if you are alone, with your family or friends... This is an interesting activity that only san Diego has.
Enjoy the ride!