Forest bathing at Ceunant Llennyrch National Nature Reserve

Ceunant Llennyrch is a National Nature Reserve in Eryri National Park, in the hills above Maentwrog. The Afon Prysor cascades through a gorge whose cliffs rise to around 80 feet and close to within 30 feet of each other in places. The oak woodland is a remnant of the Celtic rainforest, kept humid by mild, wet weather and constant spray, and it is extraordinarily rich: about 230 mosses and liverworts and almost 250 lichens.

The Rhaeadr Ddu Waterfall Walk is only about a mile, but it takes an hour because the path is steep, with uneven steps and ground. It leads to the black waterfall, and the moss-covered rocks and trees along the way are the reason to go slowly. The small car park is not run by NRW, has an honesty box and fills up, as outdoor groups use the gorge, so arrive early.