The coastal plains of India are flat low-lying lands located between mountain ranges and bodies of water. The western coastal plains are narrower, between 50-80 km wide, located between the Western Ghats and the Arabian Sea. The eastern coastal plains are wider, between 100-130 km wide, located between the Eastern Ghats and the Bay of Bengal. Both coastal plains are characterized by rivers flowing from the mountain ranges that form estuaries and deltas where they empty into the sea.