Borneo Island or Kalimantan is the large island which consists of 3 countries: Malaysia, Brunei and Indonesia. It is located in the heart of Malay Archipelago and Indonesia. Geographically, Borneo is part of ASEAN and holds most of the oil and natural gas resources in this region.
Malaysian Borneo covers area of Sabah and Sarawak with this tourist attraction:
Kuching, the capital city of Sarawak, located in the eastern Malaysian Borneo along Sarawak River. Kuching City full of palaces, fortresses and temples, including well-preserved ancient cultures. Along the Sarawak River is popular tourist spot for a walk, relax with the atmosphere of the city and enjoy capturing good scenery pictures. In this area, what is interesting are the fortress from the 19th century, Buddhist temples and plentiful street food restaurants. In addition, there are also old towns, museums or natural attractions that is easy to go, for example, Bako National Park.
Next, it will be an area of Brunei on Borneo Island which is adjacent to Sabah and Sarawak. Here is a suggested location:
The Istana Nurul Iman palace or Palace of the Light of Faith is the official residence of the Sultan of Brunei, used to welcome foreign dignitaries and be the seat of the Brunei government. It is located in Bandar Seri Begawan city. Recognized as a palace with a unique architecture that is remarkable both interior and exterior, especially golden domes and vaulted roofs that look like Islamic mosque. The palace contains 1,788 rooms on approximately 750 rai. It is open to visit after Ramadan.
And the last area is Kalimantan Island in Indonesia. A recommended attraction is:
Derawan Island located in the east coast of the Kalimantan, with numerous large and small islands, such as Sangalaki Island, Maratua Island and Kakaban Island. All of these islands have a reputation as a world-class dive sites with favorable location and abundance of marine resources, for instance, Manta ray, Mandarinfish and Frogfish. Furthermore, three of four areas of these islands are still areas of perfect tropical forests with no survey.