| name | image | heritage designation | type | Area (m²) | date founded | latitude (°) | longitude (°) | Website | Map |
|---|---|---|---|---|---|---|---|---|---|
| Peak Wilderness Sanctuary |  | part of World Heritage Site | Reservations/Natural Type | 223,790,000 | 25/10/1940 | 6.8000001907 | 80.4833297729 | website | Map |
| Sinharaja Forest Reserve |  | World Heritage Site | Reservations/Natural Type | 88,640,000 | 1978 | 6.4166665077 | 80.5000000000 | website | Map |
| Gampaha Botanical Garden | Garden | 1876 | 7.0833334923 | 79.9833297729 | website | Map | |||
| Hakgala Botanical Garden |  | Garden | 1861 | 6.9166665077 | 80.7666702271 | website | Map | ||
| Henarathgoda Botanical Garden |  | Garden | 1876 | 7.0999999046 | 79.9833297729 | website | Map |