Provins was inscribed on the UNESCO’s World Heritage List and is truly a wonder, beautifully preserved. The medieval city is surrounded by green fields, one hour away from Paris.
The atmosphere is unique, especially in the early morning, before the crowd arrives. The Caesar's Tower (actually not built by Caesar), the Tithe Barn, the Underground Galleries, the Provins and the Provins area Museum are worth a visit and you can also enjoy mediaeval shows, with horses and eagles.
If you have enough time, it is really nice to have a walk around the fortified walls and the small lanes, where you can smell the scent of roses of Provins.