Prime Minister Narendra Modi took a holy dip in Ganga, offered prayers at the Kaal Bhairav temple, and accepted a pagdi (headgear) from a common man, as he began a tour of his constituency - Varanasi - where he will inaugurate the first phase of the Rs 339 crore Kashi Vishwanath Corridor project that connects the temple town's two iconic landmarks - Kashi Vishwanath temple and Ganga ghats.