The priciest property in the world is the Antilia building in South Mumbai. It's said to be worth more than £650 million - and it's one of ten astonishing properties that will make your eyes water.
10. Great Island, Connecticut - £135 million
This property was last sold in the 1800s, but had been valued at £135 million now. For your money you get an impressive historic building, nestling on acres of prime waterfront.
9. The Playboy Mansion - £138 million
This California Mansion will hold a particular appeal for a certain demographic, and sold recently for a rumoured £138 million. For your money you get the home to the world's most famous playboy - although arguably both the estate and the playboy are slightly past their heydays.
8. Manapalan Mansion, Florida £150 million
This property sits at the southernmost tip of Florida. It boasts 33 bedrooms and 47 bathrooms, and was once home to celebrated socialite Gloria Guinness.
7. Ellison Estate, California £154 million
Larry Ellison is the co-founder of Oracle, the one of the richest men in the world, so his home is understandably lavish. It's spread over 23 acres, and home to 10 buildings - including a bath house and a tea house.
6. The Manor at Holmby Hills, Los Angeles £154 million
This was built for TV producer Aaron Spelling and his wife Candy in 1988. It has an astonishing 122 rooms, and recently sold for $200 million.
5. 18-19 Kensington Gardens £171m million
This is the only London property to make this list, and is unsurprisingly located on Billionaire's Row. The property has 12 bedrooms, an indoor pool and parking for 20 cars. It belongs to steel magnate Lakshmi Mittal.
4. Four Fairfield Pond, Sagaponack. New York £192 million
This 29-bedroom, 39-bathroom house nestles in 63 acres. It's home to Ira Rennet, the owner of a manufacturing holding company. Among the most notable features of the property are a basketball court, three swimming pools and a 91-foot long dining room.
3. Bel Air Spec Manor, Los Angeles, £193 million
It was put on the market recently for $250 million, and is the priciest home ever put up for sale in America. For your money you get plenty of room - including a James-Bond themed movie theater and four-lane bowling alley.
2. Villa Leopolda, France £578 million
The largest French villa in the world is situated on the Riviera, and sits in an 18 acre estate. It was Named after King Leopold II, the longest reigning monarch of Belgium, and its colourful history includes being featured in films of The Red Shoes and To Catch a Thief.
1. Antilia Building £650 million
This 27-storey building covers 400,000 square feet, and features three helipads on the roof - and space for 168 cars in the garage. It's owned by a single family, who live on the upper floors.
It's also worth noting that some of the lists of the world's most expensive buildings feature Buckingham Palace at number one, because it's worth £1 billion. However, given how unlikely it is ever to come to the market, it should perhaps feature in a separate list of incredibly expensive buildings owned by countries around the world.