Anuradhapura : 
Majestically located in the North Central Province, the city of Anuradhapura which goes back to nearly 1000 years, Sinhalese kings and occasional South Indian intruders reigned from the palaces of Anuradhapura. It was the most extensive and significant of the Sri Lankan royal capitals, but its extent of its history since its collapse, make it more difficult to understand than younger, shorter-lived Polonnaruwa. Many ancient monuments still stand tall, and have become a fascinating place for site seeing. Ruwanwelisaya stands on the top of the must see list when in Anuradhapura as it's one of the tallest stupas in the country, and dates back to 2BC. At present the city is a rather delightful, inspiring memento of a glorious past, worthy of being named as a UNESCO World Heritage Site out of the eight named from Sri Lanka.
Polonnaruwa :
Poḷonnaruwa is the main town of Polonnaruwa District in North Central Province, Sri Lanka. Polonnaruwa remains as the royal ancient city of the Kingdom of Polonnaruwa.
The second most ancient of Sri Lanka's kingdoms, Polonnaruwa. it is one of the ancient kingdoms in Sri Lanka. Declared the capital city by King Vijayabahu in 1070 by defeating the Chola invaders. From the ruins of royal palaces to bathing pools and ponds, temples, to the fauna and foliage of the area, this quaint historical city is ideal for a sightseeing and adventure. The Gal Vihara, Vatadage and Thuparama Image House are some of the best-known landmarks, whilst there are many others to be seen. Make your way to the Archaeological Museum in Polonnaruwa and find out more about this ancient land along with the pieces of Sri Lankan art of the centuries past. The City of Polonnaruwa has been declared a World Heritage Site.