La nuit des musées

As part of Museum Night, eco-guards welcome you to the Musée de plein air to discover the astonishing life of bats. From 5pm: The myths, beliefs and fascinating world of these flying mammals will be revealed. If you'd like to catch a glimpse of them, or even hear them with a batbox, a device that makes their calls audible, don't hesitate to sign up for the outing at 9pm. Listening outing, with registration, at 9pm Take part in a life-size nocturnal treasure hunt. Meet unusual characters who will use lanterns to reveal the historical secrets of this authentic site. Meeting point: from 6 p.m., last entry at 9:30 p.m Duration: evening Public: all