If you want to enter the scavenger hunt there's a special field for it on the submit page just below the 2 regular category fields (each user gets only one map per category). This isn't a Photo Safari, so please don't use that category.
I added Helicopter in flight to this map. You only get one map per category, sorry. If everything is working correctly, the category comes of your list once you have a map in that category. See all the rules @ http://virtualglobetrotting.com/hunts/transient-street-view/
Was wondering where the categories went. I guess reading rules helps xD