Bhu Wewa Biso Kotuwa in Polonnaruwa (පොළොන්නරුව භූ වැව බිසෝ කොටුව)
Hidden deep within farmlands of Polonnaruwa, which had been the ancient Bhu Wewa reservoir, lies a Biso Kotuwa, a sophisticated hydraulic marvel once used to regulate huge water bodies. Mysterious, compact, and expertly engineered, this forgotten structure reveals the ingenuity of Sri Lanka’s ancient water management system.
