Remote yet comfy Idwal Cottage, the oldest YHA hostel in Wales, makes a great base for walks in the Ogwen Valley, or bagging a few Glyderau or Carneddau peaks. By the shores of Llyn Ogwen, it's smallish, with a mix of four-bed-dorms and two- and three-bed rooms, plus a drying room, bar and kitchen.
YHA Idwal
Snowdonia National Park (Parc Cenedlaethol Eryri)