Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Trincomalee (92% of total searches to Mahaweli Ganga). The next most popular destinations are Polonnaruwa (5%) and Mahiyanganaya (2%). Searches for hotels in Walapane (0%) are also popular.
KAYAK users have found double rooms in Mahaweli Ganga for as cheap as $7 (Polonnaruwa) in the last 3 days. The average price is $55.