Sibu is the main tourist gateway to the Upper Rajang River, with its small riverine towns and its many Iban and Orang Ulu longhouses. Among notable landmarks in Sibu are Wisma Sanyan, the tallest building in Sarawak, Lanang Bridge (one of the longest river bridges in Sarawak) and the biggest town square in Malaysia, near Wisma Sanyan. The Lau King Howe Hospital Memorial Museum is the first and the only medical museum in Malaysia. Sibu Central Market is the biggest indoor market in Sarawak. Some tourists attractions in Sibu are the Sibu Heritage Centre, Tua Pek Kong Temple, Bawang Assan longhouses, Sibu Old Mosque, Jade Dragon Temple, Bukit Aup Jubilee Park, Bukit Lima Forest Park, Sibu Night Market, Borneo Cultural Festival (BCF), and Sibu International Dance Festival (SIDF). Timber and shipbuilding industries are the two major economic activities in Sibu.