Its average elevation is around 6.7 metres (22 ft), Chennai is 2,184 kilometres (1,357 mi) south of Delhi, 1,337 kilometres (831 mi) southeast of Mumbai, and 345 kilometres (214 mi) east of Bangalore by road.
They also defeated several kingdoms including the Cheras, Cholas and Pandyas who ruled over the area before their arrival.
The Buckingham Canal, 4 km (2.5 mi) inland, runs parallel to the coast, linking the two rivers.
The Otteri Nullah, an east–west stream, runs through north Chennai and meets the Buckingham Canal at Basin Bridge.
Several lakes of varying size are located on the western fringes of the city.
Some areas of the city have the problem of excess iron content in groundwater.Thomas, who is believed to have preached in the area between 52 and 70 CE.