You can hire bikes easily in Amsterdam, but it is best to get the simple, black bikes most locals ride. This stops you standing out like a tourist and reduces attention from negative local elements!
One place to obtain these is Holland Rent-a-Bike (or your hotel might be able to do it for you). The VVV tourist information office outside Central Station has bike-path maps. Go to Vondel Park and see loads of parakeets!
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