Perlis (Kedah Malay (Perlis dialect): Peghelih), also known by its honorific title Perlis Indera Kayangan, is a state of Malaysia in the northwestern coast of Peninsular Malaysia. It is the smallest state in Malaysia by area and population, as well as the northernmost in the country. The state borders the Thai provinces of Satun and Songkhla to the north and the Malaysian state of Kedah to the south. Perlis is the only Malaysian state that is not divided into districts, due to its small size, but it is still divided into several communes. It was called Palit (Thai: ปะลิส) by the Siamese when it was under their influence. Perlis had a population of 227,025 as of the 2010 census. Perlis experiences a tropical monsoon climate. Much of the state's highlands are part of the Nakawan Range, a subrange of the Tenasserim Hills system that spans through southern Myanmar, Southern Thailand and the Peninsular Malaysia, with Mount Perlis as the highest point at 733 m. The Nakawan also forms a natural frontier between Perlis and Thailand. The capital of Perlis is Kangar, and the royal capital is Arau. Another important town is Padang Besar, at the Malaysia–Thailand border and Kuala Perlis, the ferry town to Langkawi. The main port and ferry terminal is at the small village of Kuala Perlis, linking mostly to Langkawi Island. Another important lately developed area is Pauh Putra within the subdistrict of Kurong Anai which houses the main campus of Malaysia University of Perlis and Politeknik Tuanku Syed Sirajuddin. Perlis has a snake sanctuary and research centre at Sungai Batu Pahat. Perlis State Park and Gua Kelam are among the popular tourist attractions.