I went to the national art center on December 29. The weather wasn't great so we weren't able to enjoy the outdoors. When inside, the 2 exhibition rooms are a little poor and 5 euros per person seems too expensive for the 10 minutes we spent in the center.
Excellent place to visit and spend one or more days. Totally recommended for water activities in the lake and for sports activities such as running and trekking. It is also possible to go camping.