A must for railway buffs, the narrow-gauge Talyllyn Railway opened in 1865 to carry slate and was saved in 1950 by the world’s first railway-preservation society. One of Wales’ most enchanting railways, it puffs 7.3 miles up the Fathew Valley to Nant Gwernol. There are five stations along the way, each with waymarked walking trails. Tickets are valid all day.