Isurumuniya though not famous for it's stupa, was a famous temple historically for praying to the rain gods. Minimal effort to climb to the top of the rock. Excellent view of the surrounding area from the top of the rock. Make sure you visit the Museum and take some pictures of the famous lovers, a 6th Century Gupta style rock carving. The figures may represent Dutugemunu's son Saliya and the law caste (Sadol Kula) maiden Asokamala whom he loved. It's known that he gave up the throne for her. the tour can be completed within half an hour.