Boasting eye-watering valuations even the richest billionaires would baulk at – or delight in, if they were lucky enough to hold the deeds – the planet's priciest residential properties occupy some of the most sought-after land across the globe.

From a nine-figure penthouse apartment in London to a coastal estate that's one of Germany's most expensive homes of all time, you might just be surprised by what you can buy when money is no object. 

Click or scroll on to tour the world's most valuable homes...