We visited this on impulse, not expecting much. However it was better than we thought. Don't get me wrong, the exhibitions are really poor and virtually totally in French. However, going up in the lift and walking on top, 70 metres high was great and our two teenagers enjoyed it. Good price and free hire of binoculars. It closes for lunch so check opening times. Aim to get there bang on when it opens after lunch and you will have the place to yourself for a while until the tourists descend.

Ended up here by chance on way to Jardin du Vent we spotted a sign and went to have a look. V glad we did. There is a small exhibition at the bottom of the tower which was interesting although in French so not so good if no one in the group speaks French. Then lifts up to the top of the tower which has a viewing platform all around. There are free binocular:telescope things dotted about through which you can see for miles. There are signs nearby showing what there is to see on each direction - we spotted the Noirmoutier bridge and the big wheel in St Jean plus boats on the sea among other things. Even the not-easily-impressed teenagers enjoyed it. Well worth a visit.