Seruwila Mangala Raja Maha Vihara is an ancient temple which is among the sixteen holiest Buddhist shrines [Solomathana] in Sri Lanka.

It is reachable both from road and sea. Sea route begins at Trincomalee to Muttur on boat and another 16 km by roads. Land route is via Kantalai, to Allai which is approximately 45 km through dense forest.

List of Monuments in the complex:

1. Stupa - Origin 2nd Century B.C. - restored in 1920's.
2. Restored Northern entrance - This building has evidence of molded bricks, balustrades, guard stones and moonstones. In addition there is ruined ceremonial gateway with carved stone door frame.
3. Western entrance - Evidences of preliminary stages of stone works in moldings showing exemplary stone jointing methods.
4. Southern entrance - Balustrades with elephant motifs, guard stones and stone door frame etc.
5. Eastern entrance
6. Image house building at the Stupa terrace
7. Sculptured stone lotus
8. Bo tree shrine [Bodhighara]
9. Ancient pond
10. Remains of ancient Chapter House
11. Remains of monasteries
12. Remains of a building on stone pillars
13. Natural stone platform and caves with primitive paintings

http://whc.unesco.org/en/tentativelists/5083/