Makkah Clock Royal Tower(1)

Is topped by a 93 m tall spire and a crescent. The spire will contain a lunar galley, a control tower and an observation pod. Over the spire is the world's largest golden minaret including the 23 m tall golden crescent. The crescent is made of fiberglass-backed mosaic gold, and it weighs up to 35 tons.
The minaret and its base have been beefed up by massive loudspeakers that will emit prayers call to a distance of seven km while nearly 21,000 lamps will illuminate the surrounding area to a distance of 30 km. During occasions a 16-beam light will illuminate an area of a diameter of around 10 km while 21,000 lamps will beam white and green lights to a distance of 30 km. The light beams are intended to allow deaf persons or Muslims in far areas to know prayer timings in the western town of Makkah and nearby cities.
Just above the clock, The deck will include a high-tech telescope used to observe the moon in Ramadan. It will also include a room for sightseeing.