Try to set aside a couple of hours to make the most of a visit to the superb Lahore Museum, which has exhibits spanning the recorded history of the subcontinent. Part of the collection was removed to India after Partition but this is still the biggest and perhaps most impressive museum in Pakistan.
The museum has almost 20 galleries with items dating from the Stone Age to the 20th century. It's particularly famous for its display of Gandharan sculpture (especially the haunting Fasting Buddha), manuscripts, Qurans, its sensational array of miniature paintings, carpets, various pieces of art from the Islamic period, articles from Moenjodaro, Harappa and other Indus Valley civilisation sites and its magnificent collection of coins from the Achaemenian period onwards.
Kim's Bookshop, in the museum compound, stocks an interesting collection of novels and general-interest books.