From skyscrapers meant to pierce the clouds to futuristic resorts in the middle of the desert, billionaires have poured fortunes into projects that promised to redefine skylines, industries, and even entire countries. But not every vision makes it to the finish line.

Some are abandoned halfway, others stall due to politics, finances, or sheer impracticality. The result is a trail of half-built wonders and ambitious dreams left to gather dust. Here are 15 billionaire projects that, despite their grand beginnings, were never finished. For more content follow us also on Facebook!