The city of Dwarka is one of the seven holy pilgrimage centres in India. It is the only place which is contemporary with the events described in the epic Mahabharata, where it is described as the ancient kingdom of Krishna. It is written that upon Krishna's death the city was sunk beneath the Arabian sea. Today, archaeologists searching for the lost kingdom believe they have found evidence of its existence off the coast of the modern-day Dwarka, and are trying to understand what could have caused it to be lost beneath the sea. Video by Mithun Pramanik #bbcreel #bbc #bbcnews