Muara Takus is an ancient Buddhist temple complex located in Riau province, Indonesia. The temple was built during the 4th century AD by the Srivijaya Empire and is believed to be one of the oldest Buddhist sites in Indonesia. The complex is located near the Kampar River and consists of several structures, including a stupa, vihara (monastery), and several other buildings.

The main stupa at Muara Takus is a large brick structure that stands about 21 meters high. It has a square base and is decorated with carvings of Buddhist figures and symbols. The vihara, which is located near the stupa, is a rectangular building with an open courtyard. It is believed to have been used as a residence for Buddhist monks.

The other structures at Muara Takus include several small stupas, a few smaller viharas, and a number of other buildings that are still being excavated. The entire complex is surrounded by a wall, which was likely built to protect the site from invaders.

Despite its age, Muara Takus is still an important site for Buddhists in Indonesia and is a popular tourist destination. The site has been designated as a national cultural heritage site by the Indonesian government and is also recognized by UNESCO as part of the Srivijaya World Heritage site.