If there is one place in the northern Pakistan that I would like to visit again and again then that place is Chitta Katha lake in Shounter valley (which is a sub-valley of Neelum valley in Kashmir, Pakistan). It is a high altitude lake which requires 2 days tough trekking but the views are worth it. I have been there 3 times and plan to go yet again comes next summer. I call it "Explorer's Paradise".