Indonesia–Malaysia border crossings. Illegal immigrants are also known to use such crossings. There are numerous scheduled sea crossings between Indonesia and Malaysia, mostly between ports in the former's island of Sumatra and Peninsula Malaysia. Here is a list of ports (Indonesian port followed by the Malaysian port) where scheduled boat services operate as of April 2008: Sumatra-Peninsula Malaysia North Kalimantan-Sabah Indonesia–Malaysia border The border between the Southeast Asian countries of Indonesia and Malaysia consist of both a land border separating the two countries' territories on the island of Borneo as well as maritime boundaries along the length of the Straits of Malacca,
Geography of Brunei Geography of Brunei Brunei is a country in Southeastern Asia, bordering the South China Sea and East Malaysia. Its geographical coordinates are . Brunei shares a border with Malaysia and has a coastline. The climate in Brunei is tropical equatorial and humid subtropical at higher altitudes with heavy rainfall. Bandar Seri Begawan's climate is tropical equatorial with two seasons. Dry season is extremely hot (). Wet or rainy season is generally warm and wet (). Most of the country is a flat coastal plain with mountains in the east and hilly lowland in the west. The lowest point is at