Klen

 If you follow a dirt path east up the side of the mountain just south of Krasnostav, you'll come to the peak of Klen. Although there is not much here, there are the remains of a well at the peak of the hill to serve as a marker. The very top also has an excellent view of the area around it with the castle on Black Mountain visible in the distance.

No loot or Zombies spawn here, and it is very much out of the way of anything, so it is unlikely you would run into another player here.