The Burana Tower is a large minaret in the Chüy Valley in northern Kyrgyzstan. It is located about 80 km east of the country's capital Bishkek, near the town of Tokmok. The tower, along with grave markers, some earthworks and the remnants of a castle and three mausoleums, is all that remains of the ancient city of Balasagun, which was established by the Karakhanids at the end of the 9th century. The tower was built in the 11th century and was used as a template for other minarets. An external staircase and steep, winding stairway inside the tower enables visitors to climb to the top. It is one of the oldest architectural constructions in Central Asia.
The tower was originally 45 m high. However, over the centuries a number of earthquakes caused significant damage to the structure. The last major earthquake in the 15th century destroyed the top half of the tower, reducing it to its current height of 25 m. A renovation project was carried out in the 1970s to restore its foundation and repair the west-facing side of the tower, which was in danger of collapse.