The most striking Buddhist site I visited was Tahkt-i Bahi near Mardan. This site was a large monastery located on a hilltop, occupied from the 1st to 7th century A.D. Much of the friezes and statuary was removed between 1907 and 1913, some of which can be seen on site and in museums in Pakistan. Around this site are many smaller stupas and monasteries, but the amazing views from Takht-i Bahi make this monastery worth the long hike up.