Handy for most places, saves you queuing to buy tickets. If you went to many places, you would save money, however places are only open 10-5, so difficult to see them all. Some places do not use the paris pass, like paris awaurium, which is very frustrating.
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We include the Aquarium on the Paris Pass see http://www.parispass.com/paris-attractions/The-Paris-Tropical-Aquarium.html
Kind Regards,