Running along the Dee valley keeping close to the river for much of its length, the views seen from the Llangollen Railway are, needless to say, wonderful.
The track runs for 10 miles from Llangollen to Corwen along a section of the former GWR Ruabon–Barmouth route which closed in 1965. Another section of this line is used by the Bala Lake Railway.
N.B. The railway went into administration in March 2021 and some of the stock has been auctioned off. It ceased operations for a while, but according to their Facebook page a limited service has now been reinstated. There is a fund-raising site on Enthuse.
In places, space along the Dee valley is very limited. So much so, that Llangollen Station's footbridge overhangs the river, and Berwyn Station is perched on a ledge so small that they had to build the station master's house three stories high to fit it in.
At the time of my visit the railway was still operating from a temporary station on the outskirts of Corwen, but work was progressing well on a new permanent replacement.