This heritage site is located centered on the Trincomalee town in the eastern province of Sri Lanka. It has been archaeologically confirmed that there had been human activities within the zone from pre-historic times up to the colonial era. Recent archaeological research has confirmed that pre-historic humans have lived in many natural rock caves in this flat land area. This zone could be identified as an area where significant human activities had taken place because of two natural resources in the region: the natural harbour at Trincomalee and the copper sediment near Seruvila. Archaeological and historical sources have confirmed that the copper sediment at Seruvila had been made use of from the fourth century BC up to circa twelfth century both locally and internationally. Archaeological research has found out places where digging for copper was done, copper smelting places and smelting furnaces. As there is an indented coastline in the eastern portion of this zone, several harbours including the natural harbour that had been operative in the past have been recently identified. The Trincomalee harbour known in the past as the Gokanna Harbour is the largest natural harbour in Sri Lanka. As this harbour, which has functioned as a trade centre joining the east and the west since the past, is secured from the damage to ships from the monsoon winds as it is a hollowed area covered with hills it gathered prominence in trade activities and became a prominent harbour for the protection of the Indian ocean under the western nations. A few forts were built for the protection of the harbour and the fort built by the Dutch now known as the Fort Fredrick is an important security port in the present as it was in the past. The road network that had been operational in Sri Lanka from pre-Christian times ends at these ports in Trincomalee. Another noteworthy fact within this heritage zone is the existence of a mixed Buddhist-Hindu heritage.

As a crucial port during the colonial period, it came under the control of such western nations as Portuguese, Dutch, French and English. The Fort Fredrick bears testimony to this.

Heritage management was begun by the Central Cultural Fund in 2016 centred on the Fort Frederick. A main aim of the Project is protect the archaeological heritage of the region which was subject to a civil war and make provision for the public to view them.

Similarly, under this heritage management a program is also in hand to protect both Buddhist and Hindu heritage.