Si Sa Ket is 571 kilometres from Bangkok. This is another province in the lower Northeast that received Khmer influence. Several interesting Khmer historical sites are in the province. Si Sa Ket has an area of 8,840 square kilometers.

Built in honor of the H.R.H. Princess Mother's 60th birthday. The Somdet Phra Sri Nakarin Park is the only natural forest in Thailand with a dense concentration of fragrant, yellow Lamduan flowers, regarded as being the provincial flowers. The forest is especially aromatic during February to April. The forest is used for botanical and ecological studies, as well as wildlife preservations.

The 11th century Khmer-style Prasat Prang Ku (Ku Tower stone temple complex) consist of three prangs (towers) built of large bricks on a single platform. Remarkable highlights include a well-preserved lintel (pediments over the entrances) showing the Vishnu God standing on his garuda mount in the center. In front of the sanctuary is a 1-km long man-made Khmer reservoir, the Phrai Bung Waterfowl Pond , which commonly attracts birds for feeding during the dry season.

Sa Kamphaeng Yai Sanctuary is located within the wat of the same name, which was built afterwards. Being the province's largest Khmer stone sanctuary, it has 3 brick and sandstone prangs situated on the same platform. The northern and southern prangs have lintels depicting major Hindu and Buddhist deities. The 12th century sanctuary compound was transformed into a Buddhist monastery in the 14th century.

Another important historical site is the 10th century Ban Prasat Sanctuary , a Khmer-style building that was later modified. Like the others, it has 3 brick prangs on the same base, with the central prang being slightly larger. The Prangs have retained their perfect square forms and has a lintel with human figures over the eastern entrance.

The Ban Samo Stone Sanctuary has several important components which include a large prang, a chapel and a laterite wall with a doorway in the shape of an "X”.

The beautiful Phrom Wiharn Waterfall is set amidst wonderfully lush jungle surroundings with water all year round. A high cliff near the fall provides a scenic, panoramic view of the area.

The unique Ta Leng Sactuary houses the remains of a single prang facing east, believed to have been built around 1017-1087. The Prang's door columns are elaborately carved and has several lintels lying around the doorway floor.

An ideal swimming spot is located at the medium-sized Samrong Kiat Waterfall , where water cascades down through many levels of the 8 meters high fall to a clear pool below.

A single brick prang sits on the sandstone base of the beautiful Tamnak Sai Sanctuary surrounded by extensive landscaping. Built during 967-1017, religious Brahman ceremonies were formerly conducted here.

A vantage point to view Khao Phra Viharn is the Mo I Daeng Cliff , located 1 km away. The cliff is accessible by ascending on a 200-meters trail from the foot of the mountain.

The southern face of the cliff contains the oldest bas-relief in Thailand dating back to the 5th century.

Somdet Phra Si Nakharin Park is a large public park inside an agricultural college 2 kilometres from the provincial hall. At the park, one can see flowering shrubs called Lamduan that are the official plants of the province. Lamduan is a pale yellow Thai flower, that is at its most enchanting when it blooms from March to April and gives off a sweet fragrance that covers the whole area.

City Pillar Shrine is near the provincial hall. This square structure is decorated with marble and stained glass.

Si Sa Ket Zoo is in Rama IX Chaloem Phra Kiat Forest Park in Non Nong Kwang, 4 kilometres from the provincial hall. It is a good place to relax and to see wild animals in the zoo.

Phra That Ruang Rong is 8 kilometres away on the Si Sa Ket-Yang Chum Noi Road. The site has a traditional design. The area is used for religious ceremonies and as a museum to display the life of Isan tribes such as Lao, Khmer, Suai, and Yoe.