5. One Hyde Park (London, UK)
Value: $221 million
Owner: Rinat Akhmetov – net worth: $4.9 billion
One Hyde Park is the most expensive apartment in the world, valued at $221 back in 2011. The 25,000 sq feet abode comes equipped with bullet proof glass and is located in one of the most posh neighborhoods in London – Knightsbridge. Owner Rinat Akhmetov is the richest man in Ukraine.
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