Kalimantan, a region of Indonesia, occupies 70% of the island of Borneo, which it shares with Malaysia (specifically Sabah and Sarawak) and Brunei. The region is subdivided into four provinces: North Kalimantan, East Kalimantan, South Kalimantan, and West Kalimantan. Despite its extensive area, this book regrettably focuses on a limited selection of destinations within Kalimantan, constrained by logistical, financial, and time limitations.