How a billionaire uses their mega-mansion depends on their lifestyle and priorities. While some rooms might seem like pure indulgence (think trophy rooms for car collections), there's often a ...

While most Americans are drowning in debt or struggling with rising housing costs, the world’s tech billionaires are living in luxury mega-mansions that would make the Gilded Age robber barons blush.

When it comes to luxury real estate, America’s wealthiest citizens spare no expense. From Gilded Age palaces to modern mega-mansions, these estates feature amenities most of us can only dream of — ...