The Mont Saint Michel in Normandy is really a fantastic place and climbing to the top is quite a hard way with hundreds of stair steps. But walking around at low tide can be difficult sometime with soft sand that pulls you from under. That’s where I lost one shoe trying to go back to the concrete. I have to admit I found that funny and it took me quite a while to clean my shoes.
If you ever come to France, this is a must see place.