This colorful little graphic (put together by Visual.ly with data from Hotels.com) highlights the most and least expensive cities in the world to get a hotel room at the end of 2011. At the top of the list: Oman's Muscat, where the average room will set you back about $370 US, or £240.
And it looks like there's no end in sight, as Muscat's hotel prices rose about 50 percent between 2010 and 2011. Ibiza and São Paulo also saw big average price jumps. Prices fell the most in Doha and Beijing, two cities experiencing a hotel building boom.
You can see a larger version of the graphic here. Note that is uses £ instead of $ or €, so adjust as necessary.