Myself and my girlfriend are going to Ibiza in September. Since we got free tickets using our frequent flyer miles, we must stop in Amsterdam for an 18 hour layover.
What should we do for those 18 hours? Myself and my girlfriend spent 5 days in Amsterdam in 2004, so we have seen most of the major sights. We've already seen the Van Gogh Museum, the Anne Frank House, etc.
We plan on renting bikes for the day but I really don't know what to check out. Perhaps we'll just be lazy and sit at a canal all day drinking coffee. Do you have any suggestions for other cools things to do or see? Any other minor attractions worth checking out? Any restuarant suggestions?