The island of Sri Lanka lies in the Indian Ocean to the southwest of the Bay of Bengal. It is separated from the Indian subcontinent by the Gulf of Mannar and the Palk Strait. According to Hindu mythology, a land bidge to the Indian mainland, known as Rama's Bridge, was constructed during the time of Rama by the vanara architect Nala. Often referred to as Adam's Bridge, it now amounts to only a chain of limestone shoals remaining above sea level.

According to colonial British reports, this is a natural causeway which was formerly complete, but was breached by a violent storm in 1480.The island consists mostly of flat-to-rolling coastal plains, with mountains rising only in the south-central part. Amongst these is the highest point Pidurutalagala, reaching 2,524 metres (8,281 ft) above sea level.

The climate of Sri Lanka can be described as tropical and warm. Its position between 5 and 10 north latitude endows the country with a warm climate moderated by ocean winds and considerable moisture. The mean temperature ranges from about 16 °C (61 °F) in the Central Highlands,
where frost may occur for several days in the winter, to a maximum of approximately 33 °C (91 °F) in other low-altitude areas. The average yearly temperature ranges from 28 °C (82 °F) to nearly 31 °C (88 °F). Day and night temperatures may vary by 4 °C (7 °F) to 7 °C (13 °F). During the coldest days of January, many people wear coats and sweaters in the highlands and elsewhere.

May, the hottest period, precedes the summer monsoon
rains. The rainfall pattern is influenced by monsoon winds from the Indian Ocean and Bay of Bengal: as the winds encounter the mountain slopes of the Central Highlands, they unload heavy rains on the slopes and the southwestern areas of the island. Some of the windward slopes receive up to 2,500 millimetres (98 in) of rain each month, but the leeward slopes in the east and northeast receive little rain. Periodic squalls occur and sometimes tropical cyclones
bring overcast skies and rains to the southwest, northeast, and eastern parts of the island.

Between December to March, monsoon winds
come from the northeast, bringing moisture from the Bay of Bengal. Humidity is typically higher in the southwest and mountainous areas and depends on the seasonal patterns of rainfall, and places like Colombo experience daytime humidity above 70% all year round, rising to almost 90% during the monsoon season in June. Anuradhapura experiences a daytime low of 60% during the monsoon month of March, but a high of 79% during the November and December rains. In the highlands, Kandy's daytime humidity usually ranges between 70% and 79%.

Early Periods

Paleolithic human settlements have been discovered at excavations in several cave sites in the Western Plains region and the South-western face of the Central Hills region. Anthropologists believe that some discovered burial rites and certain decorative artifacts exhibit similarities between the first inhabitants of the island and the early inhabitants of Southern India. Recent bioanthropological studies have however dismissed these links, and have placed the origin of the people to the northern parts of India.

One of the first written references to the island is found in the Indian epic Ramayana, which described the emperor Ravana as monarch of the powerful kingdom of Lanka, which was created by the divine sculptor Vishwakarama for Kubera, the treasurer of the Gods. English historian James Emerson Tennent also theorized Galle, a southern city in Sri Lanka, was the ancient seaport of  Tarshish from which King Solomon is said to have drawn ivory, peacocks and other valuables. The main written accounts of the country's history are the Buddhist chronicles of Mahavansa and Dipavamsa.

Sri Lankan coin, 1st century CE.The earliiest-known inhabitants of the island now known as Sri Lanka were probably the ancestors of the Wanniyala-Aetto people, also known as Veddahs and numbering roughly 3,000. Linguistic analysis has found a correlation of Sinhalese language with the languages of the Sindh and Gujarat, although most historians believe that the Sinhala community emerged well after the assimilation of various ethnic groups.

From the ancient period date some remarkable archaeological sites including the ruins of Sugiriya, the so-called "Fortress in the Sky", and huge public works. Among the latter are large "tanks" or resevoris, important for conserving water in a climate that alternates rainy seasons with dry times, and elaborate aqueducts, some with a slope as finely calibrated as one inch to the mile. Ancient Sri Lanka was also the first in the world to have established a dedicated hospital in Mihintale in the 4th century BCE. Ancient Sri Lanka was also the world's leading exporter of cinnamon, which was exported to Egypt as early as 1400 BCE. Sri Lanka was also the first Asian nation to have a female ruler in Queen Anula (47–42 BC).

Flora and Fauna

The mountains and the southwestern part of the country, known as the "wet zone", receive ample rainfall at an average of 2,500 mm (98 in). Most of the east, southeast, and northern parts of the country comprise the "dry zone", which receives between 1,200 mm (47 in) and 1,900 mm (75 in) of rain annually. Much of the rain in these areas falls from Octomber to January; during the rest of the year there is very little precipitation. The arid northwest and southeast coasts receive the least amount of rain at 600 mm (24 in) to 1,200 mm (47 in) per year.

Varieties of flowering acacias are well adapted to the arid conditions and flourish on the Jaffna Peninsula. Among the trees of the dry-land forests, are some valuable species such as satinwood, ebony, ironwood, mahogany and teak. In the wet zone, the dominant vegetation of the lowlands is a tropical evergreen forest, with tall trees, broad foliage, and a dense undergrowth of vines and creepers. Subtropical evergreen forests resembling those of temerate climates flourish in the higher altitudes. Forests at one time covered nearly the entire island, but by the late 20th century lands classified as forests and forest reserves covered around ⅓ of the land.

The Yala National Park in the southeast protects herds of elephant, deer, and peacocks, and the Wilpattu National Park in the northwest preserves the habitats of many water birds, such as storks, pelicans, ibis, and spoonbills. During the Mahaweli Ganga Program of the 1970s and 1980s in northern Sri Lanka, the government set aside four areas of land totaling 1,900 km2 (730 sq mi) as national parks. The island has four biosphere reserves,Bundala,Hurulu Forest Reserve, the Kanneliya-Dediyagala-Nakiyadeniya, and Sinharaja

The national flower of Sri Lanka is the Nymphaea stellata (Sinhalese Nil Mahanel), the national tree is the Ironwood (Sinhalese Na), and the national bird is the Sri Lanka Junglefowl, which is enademic to the country.
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Ancient Sri Lanka

Colonial Era

Since ancient times Sri Lanka was ruled by monarchs, most notably of the Sinha royal dynasty that lasted over 2000 years. The island was also infrequently invaded by South Indian kingdoms and parts of the island were ruled intermittently by the Choladynasty, the Pandya dynasty, the Chera dynasty and the Pallava dynasty. The island was also invaded by the kingdoms of Kalinga (modern Orissa) and those from the Malay Peninsula.

Buddhisam arrived from India in the 3rd century BCE, brought by BhikkhuMahinda, who is believed to have been the son of Mauryan emperor Ashoka. Mahinda's mission won over the Sinhalese monarch Devanampiyatissa of Mihintale, who embraced the faith and propagated it throughout the Sinhalese population. The Buddhist kingdoms of Sri Lanka would maintain a large number of Buddhist schools and monasteries, and support the propagation of Buddhism into Southeast Asia
Sri Lanka had always been an important port and trading post in the ancient world, and was increasingly frequented bymerchantahips from the Middle East, Persia, Buruma, Thailand, Malaysia, Indonesia and other parts of Southeast Asia. The islands were known to the first European explorers of South Asia and settled by many groups of Arab and Malay merchants.

A  Portuguese
colonial mission arrived on the island in 1505 headed by Lourenco de Almeida the son of Francisco de Almeida. At that point the island consisted of three kingdoms, namely Kandy in the central hills, Kotte at the Western coast, and Yarlpanam (Anglicised  Jaffna) in the north. The Dutch arrived in the 17th century. Although much of the island came under the domain of European powers, the interior, hilly region of the island remained independent, with its capital in Kandy.

The British East India Coimpany established control of the island in 1796, declaring it a crown colony in 1802, although the island would not be officially connected with British India. The fall of the kindom of kandy in 1815 unified the island under British rule.