Follow the green line. And buy a City Pass. That's all you need to know if you don't want to go wrong in lovely Nantes (pronounced “nunt”).
International
From Castles To Art Installations: An Unforgettable Journey Through Nantes, France
If your France tour does not include a stop at Nantes, its sixth largest city, then you are missing out on some stunning museums and art collections. Here's a glimpse into what to expect in Nantes