Chill/relax weekend outside Athens

Kalimera,

Me and my wife has some days off for easter (Friday to Monday) and we are looking to escape Athens for a weekend.

Object : mountain or forest. Chill & relax. Nothing to visit.

I don’t need any activity to do, just a barbecue & good wine, a good view, a good place to walk.

We have a car, I can go up to 3h trip.

PS: low budget if possible. I dont need luxury, just a good place to relax between trees or in the mountains.

Efxaristo.