The first skyscraper built in Monaco for 30 years, when complete, the penthouse atop the Odeon Tower will be the world’s most expensive apartment. The $400m, 38,000-square-foot Sky Penthouse is split across five levels (each with its own kitchen), with stunning views of the coast through its floor-to-ceiling windows and from the rooftop remarkable terrace, infinity swimming pool and vertigo-defying water slide. The brochures along for the property cost the developer $1,000 each to produce, so its a good job nearly 30% of Monaco’s residents are millionaires. To find out more, head over to their site: www.odeon.mc