Ancient cave dwellings with Brāhmī inscriptions, as well as ruins of a small Stupa complex, have been found at Nā Uyana which date back to 3rd century BCE.
As Uttiya was the successor to King Devanampiya Tissa, during whose reign Buddhism was introduced to Sri Lanka, the ancient monastery at Nā Uyana seems to have been one of the first in the country established outside Anuradhapura.
[1] Most Venerable Angulgamuwe Ariyananda Mahāthēra moved to Nā Uyana in 1997 with a group of monks and started a revival that has made it the largest monastery in the Yogasrama Samstha.
Most Venerable Nauyane Ariyadhamma Mahāthēra, the Spiritual Director of Śrī Kalyāṇī Yogāśrama Saṃsthā, also used to reside at Nā Uyana.
Most Venerable Bhaddanta Āciṇṇa Mahāthēra, the current Pa-Auk sayadaw, undertook a long-term personal retreat at Nā Uyana Āranya in 2007, staying in seclusion and suspending his teaching schedule throughout the year.