Ranmasu Uyana is located adjoining Tisa wewa in Anuradhapura. It was used as the pleasure garden of the king and dating back to more than 2000 years. The well planned garden was spreading over 40 acres of land. It showcases some important factors of the gardening and urban planning in the days of pre-Christian era.

The garden was located in a rocky outcrop and huge boulders were carefully used to enhance the natural beauty of the garden. The granite stones were extensively used for other constructions such as pillars and seating places in the garden. There are three ponds in Ranmasu Uyana and all of them are completely constructed by using nicely carved stone slabs. The water for the bathing ponds was supplied from the nearby Tissa wewa. The water was directed through the underground canal system and there had been mechanism to filter the water before pouring in to the ponds. Ranmasu Uyana believed to be the spot, where Saliya and Ashokamala frequently met.