Hakgala Botanical Garden is one of the five botanical gardens in Sri Lanka. The other four are Peradeniya Botanical Garden,Henarathgoda Botanical Garden, Mirijjawila Botanical Garden and Seetawaka Botanical Garden. It is the second largest garden in Sri Lanka. The garden is contiguous to Hakgala Strict Nature Reserve.
Hakgala Botanical Garden is situated on the Nuwara Eliya-Badulla main road, 16 km from Nuwara Eliya. The garden was established in 1861, under George Henry Kendrick Thwaites as an experimental cultivation of Cinchona, a commercial crop thriving at the time. Once after the Tea replaced the Cinchona, it was turned into an experimental Tea cultivation. In 1884 it transformed to a garden. Since then many sub tropical and some temperate plants were planted in the gardens.
In the folklores, it says Sri Lankan demon King Ravana after abducting Sita, kept her hidden in this area and area was offered to Sita as a pleasure garden, the place finds mention in the Ramayana as Ashok Vatika. The area was named as "Sita Eliya" and "Sita Amman Temple" was built on the site.