A closer look

If you ever wonder why a one-bedroom flat in London costs the same as a private island, blame the oligarchs. To protect their totally-legitimate post-Soviet fortunes from seizure or taxation, mega-rich tycoons buy up entire blocks of high-end London property through anonymous shell companies. They leave the opulent mega-mansions completely empty, treating prime residential real estate as nothing more than a giant offshore bank vault with really nice crown molding.