You may be uncertain of what a good picture is. But whether you like a picture because of its significant content regarding the related spot or because of its artistic value, is totally up to you.
Every photo that is uploaded starts with 10 votes at 5 points. The reason for this system is that a photo should not get 10 points with just one vote.
So give us your vote and separate the wheat from the chaff ;-)
Oh and one other thing: Pictures - of course - can drop in the average-score: Imagine a fine picture has got an average score of 8.000 points. Any score of '8' will not change the average-score. BUT just a single '7' at this point of time will reduce the average.A Place of Interest is a regional spot that might be interesting to visitors. The place of interest has to be OUTSIDE of a city. For example Stonhenge IS a place of interest, the Sydney Opera in contrast to that is NONE, as it rather would be affiliated with Sydney.
Landscape is supposed to comprise all those connected natural areas that are known for themselves. For example the Scottish Highlands are a landscape in that sense, just like the Rocky Mountains or the Everglades are. Just as well, mountains, massive rocks or (rather small) islands are landscapes. If your picture was taken in a city or a place of interest within a landscape, it is rather adjoined to the city/place of interest.