If your trip to Del Mar is all booked but your itinerary is looking a little empty, we can give you a helping hand.A scan of a postcard stand will show that a trip to Del Mar is not complete without going to University of California, San Diego. Considered the most well-known attraction in the city, you might want to spend more time here than a quick stop.Plan a stop at Del Mar Beach. It's one sight you'll usually find on travelers' to-do lists. Free Flight and Torrey Pines State Beach are also close by and worth a pit stop.