Koziakas during winter is a mountain that can give you the experience you are looking for, combined with an easy hike up and a warm stay...
Agios Antonis, 2.815 m.
Mouses Plateau, 2.650 m.
Smolikas 2.637 m.
Christaki Refuge, 2.430 m. Olympus Mt
Gramos, Tsouka Petsik 2.520 m.
Vasilitsa, Gomara 2.126 m.
Mt. Olympus, South side
Metamorfosi, 2.699 m. Mt. Olympus
The most frequent dangers in the mountains and how to avoid them
Keep an eye and stay alive, by using the 5 Red Flags