It isn’t on any official map – but make your way through a soggy bed of leaves and tall grass off Telok Blangah Road, and a gleaming body of water emerges, filled with creeper plants and littered with dry leaves and twigs. Built in the shadow of Mount Faber, Keppel Hill Reservoir, as it was then known, is in fact less than 20 metres long and two metres deep – no more than one-third the size of an Olympic swimming pool
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