Probably the most picturesque and the most photographed lake in Wales, Talyllyn was formed after a huge landslide dammed the glacial valley floor - the scar of which can still be seen in the hillside to the south just below the lake. Today the lake is some 219 acres in size but despite this it is a relatively shallow lake, being on average only 3 meters deep.
Popular with many fishermen and fisherwomen, the lake is also popular with kayakers and the odd sailing boat.
A little down the valley from Talyllyn is the Talyllyn Railway, a narrow gauge steam railway which runs down to the coast at Tywyn Wharf in Tywyn. Part of the Great Little Trains of Wales, the line runs through beautiful countryside and is some 7.5 miles long.