These visualizations are not merely a creation of the imagination. They represent a soon-to-be very real building called Tour Odeon, which is set to rival its neighbour: Monaco's and the world's most expensive penthouse, worth a cool $305 million. Expected to be completed mid-2014, work on the façade will begin in July. As the visualizations will attest, the price tag is indicative of the sheer luxury and fantasy of the concept that is at the very heart of this project and culminates at its summit, with the addition of a billionaires playpen: the penthouse. Complete with waterslide access to its private infinity pool that overlooks the Ligurian Sea, the penthouse also boasts an expansive private lobby and interiors by Alberto Pinto.