It is one of the two hills that the town of Kalimpong stands between. Kalimpong is situated on a ridge connecting the two hills, Durpin and Deolo. The hill is 1,704 metres (5,590 feet) and is the highest point of Kalimpong town. The hill is located north east of the town. Three water reservoirs, two of which serve as the primary drinking water source to the town are present atop this hill. The town of Kalimpong, the surrounding villages of Relli valley, Teesta River and its valleys all can be viewed from this point.
On a clear day, the snow-clad mountains of West Sikkim are also visible from this hill. At the summit of this hill, there is a park built for recreational purposes which feature exotic flowers. The park is a popular picnic spot for tourists as well as locals. Overall Deolo provides a panoramic 360 degree view of Kalimpong town and its neighbouring hill. This beautiful nature park offers one of the best views of Mt. Kanchenjungha and River Teesta. Delo has been converted into a nature park by the Government and there are Government accommodation options within the park as well as luxurious private accommodation options outside the park.