they're adherents of sufism, often called the mystical dimension of islam.their religion is more about searching for meaning and spiritual development than dogma and interdictions. >> it's about forgetting yourself, leaving your ego behind while you're whirling, and thinking about god. that's the path that the koran shows us, if you read it properly. at least that's the way our founder mevlana showed us. >> the souvenir stores in town have also picked up on the dervish trend. the dancing dervishes sell like hotcakes -- but only a few people know what they stand for. young architect carine gug was surprised to find such a mystical movement belonged to islam. >> for me, religion is this philosophy of life. so that means being respectful, trying to find the balance in your life. i've always been interested in dervishes. for me, it was mystical. i was curious about it how they could turn for so long. >> but you won't find any dervishes in the mosques of istanbul. they practice their faith in private. before, they lived an ascetic life in monasteries. the turkish