who built the sudarshan lake in the saurashtra region
History of Gujarat Chandragupta Maurya of Maurya dynasty conquered a number of earlier states of Gujarat circa 300 BC. Pushyagupta, a Vaishya, was appointed Governor of Saurashtra by the Mauryan regime. He ruled (322 BC to 294 BC) Girinagar (present Junagadh) and built a dam on the Sudarshan lake. Emperor Ashoka, the grandson of Chandragupta Maurya, not only ordered engraving of his famous edicts on the rock at Junagadh, but asked his Governor Tusherpha to take out canals from the lake where an earlier Mauryan Governor had built a dam. Between the decline of the Mauryan power and Saurashtra coming under the sway of Samprati Mauryas of Ujjain, there was a Greek incursion into Gujarat led by Demetrius.In the first half of the first century A.D. there is the story of a merchant of King Gondaphares landing in Gujarat with Apostle Thomas.The incident of the cup-bearer killed by a lion might indicate that the port city described is in Gujarat.[13][14]
Lake Baikal Lake Baikal is the largest freshwater lake by volume in the world, containing 22–23% of the world's fresh surface water.[3][6][7] With 23,615.39 km3 (5,670 cu mi) of fresh water,[1] it contains more water than the North American Great Lakes combined.[8] With a maximum depth of 1,642 m (5,387 ft),[1] Baikal is the world's deepest lake.[9] It is considered among the world's clearest[10] lakes and is considered the world's oldest lake[11] – at 25–30 million years.[12][13] It is the seventh-largest lake in the world by surface area.