The world might pick on its air of unpredictability and cut-throat insecurity — but Dubai stands proudly with its unabashed display of opulence. The air ALWAYS stays positive — for those with deep pockets.

The cosmopolitan city is home to the tallest building in the world, the second most expensive hotel in the world and one of the most lucrative real estate markets. The city hosts a wide variety of luxury compounds, apartments, and penthouse mansions that can rival NYC.

Located in Bel Air, Los Angeles, the above-pictured house spans 38,000 square feet, has 12 bedrooms and 21 baths and an asking price of $250 million. This, people, is the most expensive house in America.

What makes it the most expensive house? A room dedicated to candy, a James-Bond-themed movie theatre, 100 art installations, an 85-foot long infinity pool. an auto-gallery (fancy word for garage) stocked with luxury cars worth $30 million and a staff of 7 caretakers who have been paid for two years are only a few features.

British actress Keira Knightly moved into this swanky apartment in the very happening TriBeCa neighbourhood in Manhattan, NYC in 2015. And only a little over a year later, she has sold the apartment for $6 million.

We are not sure why she moved out of this gorgeous apartment that has 23 feet ceilings and a 900 square foot private patio for entertaining. The two-floored house spans across 3,820 square feet, 3 bedrooms and 2.5 baths.

Pictures of the apartment that has a contemporary/modern vibe were released by Keller Williams NYC. Check them out below.

Living in Dubai calls for luxury and that includes custom-built walk-in closets. If you think this multi-purpose design item is frivolous then think again - a well-designed closet takes hours out of your getting-ready time, creates more space and when done tastefully, looks super classy.

What do you do when you're rolling in dough - left, right and centre? You build a house with three helipads, buy a castle to live like a king and construct an auto museum right inside the garage - at least that's what the richest of the world do.

From century old castles with private heath centres, magnificent ballrooms to skyscrapers with luxurious interiors and dozens of amenities worth hundreds of millions of dollars - we've got a rundown of the world's 10 most expensive homes and the people rich enough to own them.