The start of the Watkin Path has been described as the prettiest beginning of the routes up Snowdon. It begins at Bethania on the A498 and climbs initially through old broadleaved woodland. After leaving the woods, the path climbs past the waterfalls of the Afon Llan to the glacial cirque of Cwm Llan, crossing a disused incline from an abandoned slate quarry. It then reaches Plas Cwmllan, formerly the home of the quarry manager for the South Snowdon Slate Works beyond, and later used for target practice by commandos during the Second World War. Near Plas Cwmllan is the large boulder known as Gladstone Rock, which bears a plaque commemorating a speech given in 1892 by William Ewart Gladstone, the then 82-year-old Prime Minister, on the subject of Justice for Wales. The slate workings in Cwm Llan were opened in 1840, but closed in 1882 due to the expense of transporting the slate to the sea at Porthmadog. Various buildings, including barracks and dressing sheds, remain.