The Kuwait Towers are a group of three slender towers in Kuwait City, standing on a promontory into the Persian Gulf. They were the sixth, and last, group in the larger Kuwait Water Towers system of 34 towers (33 store water; one stores equipment), and were built in a style considerably different from the other five groups. The Kuwait Towers were officially inaugurated in March 1979 and are regarded as a landmark and symbol of modern Kuwait. The towers were closed for maintenance from March 2012 to 8 March 2016, with a massive fireworks festival commemorating the re-opening. The main tower is 187 metres (614 ft) high and carries two spheres. The lower sphere holds in its bottom half a water tank of 4,500 cubic metres (1,200,000 US gal) and in its upper half there is a restaurant that accommodates 90 people, a café, a lounge and a reception hall. The upper sphere, which rises to 123 metres (404 ft) above sea level and completes a full turn every 30 minutes, holds a café. The second tower is 147 metres (482 ft) high and serves as a water tower. The third tower does not store water, housing equipment to illuminate the two larger towers. The two water towers hold 9,000 cubic metres (2,400,000 US gal) of water altogether. Although there are three towers, the structure is often referred to as Kuwait Tower in singular.