Step onto this 19th-floor terrace bar for a breath of fresh air, and the views might just take it away. Nestled amongst the capital's soaring skyscrapers, this open-air rooftop lounge features stylish furnishings, classy cocktails to match the scenery, plus occasional live music and DJs. It's perfectly legal to get this high; in fact, you don't even need to be a guest of the hip NYX Hotel to lose your head in the clouds. Note that the opening hours are somewhat dependent on the weather.