Using the GPS to mark a location for where a car have been parked was just clever.
I've experienced that when going on a holiday with my parents and siblings.
We found the car eventually but was walking around for 30-40 min. before recognizing the right street again. (That was in Italy)
i've found the best software as an excellent excuse for family holiday use of my E90 is Shozu. "phone gran up to tell her all the photos are on our Flickr site" is a classic.