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Iceberg homes: That's what today's billionaires are building - with underground discos, dog spas and even waterfalls... but it's driving the neighbours crazy | Daily Mail Online
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Iceberg homes' on the rocks as council becomes first to prevent wealthy owners from digging huge four-storey basements | Daily Mail Online
How London's 'iceberg' homes and luxury mega basements represent wealth burrowing underground - ABC News
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