The first underwater city, known as Dwarka, was created by the ancient civilization of the Indus Valley, specifically associated with the Hindu epic Mahabharata. Dwarka is believed to have been a prosperous city and a significant urban center linked to Lord Krishna. Its submerged ruins, found off the coast of Gujarat, India, suggest advanced urban planning and maritime capabilities of the Indus Valley civilization. The discovery of Dwarka has led to various archaeological explorations and inquiries, further igniting interest in ancient Indian history and its legendary narratives.