At the top of Monaco's tallest building, is a five-storey penthouse complete with water slide, dance floor, and infinity pool.

Its $440 million price tag blows the former 'world's most expensive apartment' record right out of the water. London's One Hyde Park sold earlier this year for only $300 million.

For those readers who do have the cash, there is a catch. Owners must be, or must become, permanent residents of Monaco

"There’s nothing like La Tour Odeon in Monaco," said Edward de Mallet Morgan of Knight Frank, who markets apartments in the building.

The many amenities for residents of the building include 24/7 concierge, a private cinema, valet parking, and a private Mercedes shuttle service.

And of course, the Monaco Grand Prix will be held right outside, and the Cannes Film Festival occurs just down the road.

See also:

The most expensive house in the world is for sale

What type of property does $5 million buy around the world?

Australia's most expensive apartment