Tal-y-Llyn sits deep within a glacial valley at the foot of Cader Idris. This quiet spot is famous for its long ribbon lake and dark mountain slopes. The still water often acts as a mirror for the high peaks and green scree. My top tip is to visit the ancient St Mary’s Church. You can see the rare medieval painted ceiling for free. The steam from the narrow-gauge railway often drifts across the lower pass. This line was the first in the world to be kept alive by a band of volunteers. The air carries the sharp scent of mountain moss and fresh rain. Steep paths lead away from the shore toward the stony summit. This landscape feels raw and timeless.