There's only so much beach, hotel and pool I can take on a 2 week holiday so it was well worth going to the museum. It is not huge so about 2 hours is enough. The collection is great and you get to see some of his less famous pieces. You can use a free audio guide which is really informative. Even if you aren't familiar with Picasso you get a real insight into his ideas behind his work. There is a cafe and a gift shop. The only complaint would be that the museum is absolutely freezing. They really crank up the air conditioning which is a big contrast to the temperature outside.
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