The most expensive city in the world

Luanda in Angola has become the most expensive city in the world, here some interesting prices just in case you plan to visit the country:

A standard hotel room costs $400
a non-alcoholic drink in the lobby $10 (though a mere $2 in a supermarket). 
An hotel buffet is $75 and a slice of pizza on the street $25.
A taxi-ride within the city easily adds up to $50, especially since the taxi company–the only one in town–starts the meter as soon as the car leaves the depot.  
A standard flat costs $10,000-$15,000 a month to rent or at least $1m to buy. 
A melon in a supermarket costs $100.

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