Colombo

Colombo is the commercial capital and largest city of Sri Lanka, with a population of 4.6 million metropolitan area, with 555,031 in the city limits, and a popular tourist destination. It is located on the west coast of the island and adjacent to Sri Jayawardenepura Kotte, the legislative capital of Sri Lanka. Colombo is often referred to as the capital since Sri Jayawardenapura Kotte is within the urban area of, and a satellite city of, Colombo. It is also the administrative capital of Western Province, Sri Lanka and the district capital of Colombo District. Colombo is a busy and vibrant place with a mixture of modern life and colonial buildings and ruins. It was the legislative capital of Sri Lanka until 1982.

Dambulla

Dambulla Cave Temple, Central Sri Lanka

Dambulla cave temple,also known as the Golden Temple of Dambulla is a World Heritage Site (1991) in Sri Lanka, situated in the central part of the country. This site is situated 148 km east of Colombo and 72 km north of Kandy. It is the largest and best-preserved cave temple complex in Sri Lanka. The rock towers 160 m over the surrounding plains.There are more than 80 documented caves in the surrounding area. Major attractions are spread over 5 caves, which contain statues and paintings. These paintings and statues are related to Lord Buddha and his life. There are a total of 153 Buddha statues, 3 statues of Sri Lankan kings and 4 statues of gods and goddesses.

Sigiriya

Sigiriya Rock Fortress , Central Sri Lanka.

Sigiriya (Lion Rock) is an ancient palace located in the central Matale District near the town of Dambulla in the Central Province, Sri Lanka. The name refers to a site of historical and archaeological significance that is dominated by a massive column of rock nearly 200 metres (660 ft) high. 
According to the ancient Sri Lankan chronicle the Culavamsa, this site was selected by King Kasyapa (477 – 495 CE) for his new capital. He built his palace on the top of this rock and decorated its sides with colourful frescoes. 

Trincomalee

Trincomalee Beach, North Eastern Sri Lanaka.

The recorded history of Trincomalee spans more than two and a half thousand years beginning with civilian settlement associated with the Koneswaram temple in the pre-modern era. One of the oldest cities in Asia, it has served as a major maritime seaport in the international trading history of the island with South East Asia. In the ancient world, it was successively the capital of eastern kingdoms of the Vanni country, developing under the Pallava Dynasty, Chola Dynasty, Pandyan Dynasty, the Vannimaichieftancies and the Jaffna kingdom through the Koneswaram shrine's revenue. Trincomalee's urbanization continued when made into a fortified port town following the Portuguese conquest of the Jaffna kingdom, changing hands between the Danish in 1620, theDutch, the French following a battle of the American Revolutionary War and the British in 1795, being absorbed into the British Ceylon state in 1815.

Polonnaruwa

Wata Daage , Polonnaruwa, North Central Sri Lanka.

Polonnaruwa is the main town of Polonnaruwa District in the North Central Province, Sri Lanka. Kaduruwela area is the Polonnaruwa New Town and the other part of Polonnaruwa, remains as the royal ancient city of polonnaru kingdom.

The second most ancient of Sri Lanka's kingdoms, Polonnaruwa was first declared the capital city by King Vijayabahu I, who defeated the Chola invaders in 1070 to reunite the country once more under a local leader.

Anuradhapura

Ruwanweli Maha Stupa, Anuradhapura, North Central Sri Lanka.

Anuradhapura is a major city in Sri Lanka. It is the capital city of North Central Province, Sri Lanka and the capital of Anuradhapura District. Anuradhapura is one of the ancient capitals of Sri Lanka, famous for its well-preserved ruins of ancient Sri Lankan civilization. It was 3rd capital of the Kingdom of Rajarata after Tambapanni and Upatissa Nuwara.

The city, now a UNESCO World Heritage Site, was the center of Theravada Buddhism for many centuries. The city lies 205 km north of the current capital Colombo in Sri Lanka's North Central Province, on the banks of the historic Malvathu Oya. It is one of the oldest continuously inhabited cities in the world and one of the eight World Heritage Sites of Sri Lanka.

Kandy

Temple of the Tooth Relic, Kandy, Central Sri Lanka.

Kandy is a major city in Sri Lanka, located in the Central Province, Sri Lanka. It is the second largest city in the country after Colombo. It was the last capital of the ancient kings' era of Sri Lanka. The city lies in the midst of hills in the Kandy plateau, which crosses an area of tropical plantations, mainly tea. Kandy is both an administrative and religious city and is also the capital of the Central Province. Kandy is the home of The Temple of the Tooth Relic (Sri Dalada Maligawa), one of the most sacred places of worship in the Buddhist world. It was declared a world heritage site by UNESCO in 1988.