Answer: Krishna River
Notes: A 390-year-old Deepastambham (lamp post) was discovered on the River Krishna's edge in Nalgonda district, Telangana. Standing at 20 feet, the pillar with lamp hollows and a multilingual inscription dates back to June 1635, dedicated to Kasi Viswanatha. Uncommon in the Deccan region but prevalent in west coast temples like Goa, it served as a potential riverine trade route lighthouse, fostering trade connections in early medieval times.
