One of the most atmospheric and least-visited ancient sites in Sri Lanka – a ruined forest monastery built by ascetic monks in the 1st century BCE on a granite mountain shrouded in dense medicinal forest, its stone pathways, bathing ponds, and meditation platforms still visible beneath the encroaching jungle in a way that feels genuinely ancient rather than managed for tourism. The surrounding forest is a protected nature reserve rich in endemic birdlife and medicinal plants, and the ascent to the ruins is as much a nature walk as a heritage experience.