We talked about the most expensive house in the world not too long ago. Now take a peek at the most expensive penthouse in the world. At a price tag of £100m, the One Hyde Park in London will be completed in 2010 and will feature 80 residential units, communal spas, squash courts and a private wine-tasting facility. The residents are expected to be the well-heeled, from oil moguls to actors to Russian oligarchs.
Just how did they find that kind of money?