The top 10 highest rated anime gets a special mention in the anime pages. An anime must have a minimum number of votes to get a Top 10 award. The top 10 is calculated dynamically from the ratings during every Routine Maintenance cycle. If you want a longer list, ou can get one by going to the Animelist and doing a descending sort on the Rating column, direct link.
The Top 10 used to be listed on the AniDB main page, but this led to alot of vote stuffing, so it was decided that it would be best removed from there.