I was wondering around the south of Riften, basically it was late and I didn't wanna start any quest's. I got myself the "you can't go anyfurther". so turned East, Saw some Blood on the snow and followed the trail. It lead me tohttp://i1254.photobucket.com/albums/hh611/Trace9569/HPIM1198.jpg this, right before I got their I had to fight a frost troll. Climbed down from their and continued east and found one of the Stendar Towers.
No loot or anything like that, but I did think it was rather neat. Just a random area, with a really good view. If their was anything nearby I totally missed it.