the buddhist site of tokar dara in the swat valley, pakistan

swat district khyber pakhtunkhwa pakistan suvastu suhoto gandhara udyana tokar dara najigram stupa monastery buddhism buddhist buddha archaeology assembly hall antiquities barikot artefact kushan turk shahi hindu bazira najirgram valley complex site mountain historical place architecture temple archeology civilization ancient history ruin kpk kushanas asia buddist 2nd century stones prayer area wall dome