Murghzar Mini Zoo sits at the foot of the Daman-e-Koh viewpoint in the Margalla Hills, an easy stop if you're already heading up for the views over Islamabad. The collection is modest — a few deer, birds, and monkeys — but the forested setting is pleasant and it's a popular spot for families.
Nearby you'll find a display corner of the Pakistan Museum of Natural History and a Japanese-style children's park, a gift from the children of Japan to Pakistani children. It's not a destination on its own, but pairs well with a morning walk in the hills.