It lets you search for campgrounds by landmark. You also enter the distance you are willing to be from that landmark. It then comes back with a list of campgrounds in the area, including their amenities and prices.
Enter "Rose Bowl" and choose 50 miles as the distance. You'll get back information on about 20 campgrounds. They range from 13 to 42 miles from the Rose Bowl. I checked prices on a few of them and it looks like they start at $30 and go up from there.
