"Anuradhapura The Birthplace of Sinhala Civilization"
Anuradhapura, according to legend, was first settled by Anuradha, a follower of Prince Vijaya the founder of the Sinhala race. Later, it was made the Capital by King Pandu kabhaya about 380 BCE.
King Pandu kabhaya, 380 BCE
According to the Mahavamsa, the epic of Sinhala History, King Pandu kabhaya’s city was a model of planning. Precincts were set aside for huntsmen, for scavengers and for heretics as well as for foreigners. There were hostels and hospitals, at least one Jain chapel, and cemeteries for high and low castes.
Water supply was assured by the construction of 'tanks', artificial reservoirs, of which the one called after himself, exists to this day under the altered name of Baswak Kulam.
King Devanampiya Tissa
It was in the reign of King Devanampiya Tissa (250-210 BCE) that the Arahat Mahinda. son of the great Buddhist Emperor Asoka, led a group of missionaries from North India to Sri Lanka. With his followers he settled in a hermitage of caves on the hill of Mihintale, (literally, Mahinda's Mountain).
The new religion swept over the land in a wave. The King himself gave for a great monastery in the very heart of the City his own Royal Park - the beautiful Mahamegha Gardens.
The Buddhist principality had but a century to flourish when it was temporarily overthrown by an invader from the Chola Kingdom of South India. The religion, however, received no set-back.
King Duttha Gamini
At this time far away on the southeast coast, was growing up the prince who was to become the paladin of Sinhala nationalism: Gamini, soon to be surnamed Duttha, the Undutiful (161 - 137 BCE). For all his martial prowess, King Duttha Gamini must have been a man of singular sensibility. The lives he had had to take weighed heavily upon him, for slaughter-in any cause- is repugnant to the sincere Buddhist; and the better part of his regime was devoted to expiatory service to the Sangha.
The Mirisavati Temple and the mighty Brazen Palace nine stories high, he presented to them. But he did not live to see the actual completion of the Ruvanveliseya Dagaba (picture at top right), his most magnificent gift .
Two more, at least, of the Anuradhapura Kings must be mentioned; if only because some of the greater monuments are indisputably attributable to them.
King Vattagamani Abhaya
The earlier of these was Vattagamani Abhaya Valagam Bahu (103 & 89-77 BCE) in the first year of whose reign Chola invaders again appeared and drove him temporarily into hiding. For fourteen years, while five Tamil Kings occupied his throne, he wandered often sheltering in Jungle caves. It is recorded that as in his flight he passed an ancient Jain hermitage, an ascetic, Giri called and taunted him. 'The great black lion is fleeing!' Throughout his exile the gibe rankled.
Winning the Kingdom back at last, he razed the Giri's hermitage to the ground, building there the Abhayagiri Monastery. The name is a wry cant on his own name and the tactless hermit’s as well as (meaning mountain of fearlessness) a disclaimer of his cowardice!
King Mahasena
Next came the heretic king Mahasena (274 - 301 A.D.). He alienated to the Abhayagiri vast spoil from the Maha Monastery, Devanampiya Tissa’s original foundation. But he had more substantial claim to notability than his heresy; not only did he build (for the heretics) Sri Lanka’s vastest completed Dagaba the Jetavana Ramaya, - but he was also the greatest irrigator of the Sinhala Kings, building 16 major tanks and a great canal.
Anuradhapura was to continue for six hundred years longer as the national capital. But as the protecting wilderness round it diminished with prosperity, and internecine struggles for the royal succession grew, it became more and more vulnerable to the pressures of South Indian expansion. The final blow came when the Chola King Rajaraja I invaded Sri Lanka, burnt and looted the city. Anuradhapura was finally abandoned and the Capital withdrawn to more secluded fastness.
But the monuments of its heyday survive, surrounded by such beauties as become the past: the solemn umbrage of trees, the silence of cold stone, and the serenity of the sheltering sky.
Bentota is 65 km from Colombo and is a popular and fully geared tourist resort. Before the era of mass tourism and the consequent construction of the National Tourist Resort of Bentota, the first foreigners to stumble upon this charming spot, must have been Arab merchant sailors, who also discovered Beruwela in the 11th Century a little further north. 
Yala National Park is situated in the kingdom of Ruhuna which had an advanced civilization by evidence of the remains of dagabas and reservoirs built to irrigate large extents of cultivable land.
19 kilometers from Yala up the Menik Ganga to Pahalahentota, 19 kilometers from Pahalahentota to Bambawa, and 3 kilometers from Bambawa to Palatupana. 
together with natural water holes. These sources of water are helpful for the survival of the wildlife. Several natural rock pools contain water throughout the year.