Riyadh’s landmark tower is a stunning piece of modern architecture – it’s particularly conspicuous at night, when the upper sweep is lit with constantly changing coloured lights. Rising 302m high, its most distinctive feature is the steel-and-glass 300-ton bridge connecting the two towers. High-speed elevators fly you (at 180km/h) to the 99th-floor Sky Bridge , from where the views are breathtaking (you’re allowed to take photos from up here). Avoid weekends and evenings after 6pm, when it can get very crowded.