The Penthouse, London, UK - $200 million

5. The Penthouse, London, UK - $200 million

When you say the word London, you expect the word high prices to follow. However, £6,000 per sq/ft apartment will shock even the most experienced real estate agents. Located in Hyde Park, this is the most expensive flat in the world.

Not only does it offer magnificent views of Central London, it has its own car park and access to a number of spas and squash courts. It even has its own wine tasting rooms! As is expected, the apartment is protected by a number of security features such as bulletproof windows, iris scanner and a panic room. You will find round-the-clock help here on hand.

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