Passing through next May solo,3 nights planned ---long enough?
Sure it is!
Definitely! We've been to Lyon several times, from 1 to 3 nights, and you can see plenty in a short time. It's pretty compact for a big city, and public transportation is excellent.
Thanks for the advice.3 nights it will be.
We spent four nights in May and it was fine and I would go back really liked it.