Think about the place you call home. Have you ever had to use a bucket to collect rainwater from a leak in the ceiling? What do you know about the history of your building? Perhaps you've gathered that the last resident collected poorly trained cats. Then your home definitely does not belong on this list.

On the other hand, if you have an entire floor dedicated to closets, if Alfred Hitchcock ever filmed a movie on your property, or if your home once belonged to the crown prince of Saudi Arabia, we'll take a look. The Most Expensive Houses in the World range in price from just under $100 million to just over $1 billion. A great deal are located in London and New York, though some can also be found in Los Angeles, India, and Istanbul. Take a look at the globe's most lavish estates. 

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