Corn Du the last ice age by ice scouring out hollows below the peaks, the water being partly dammed by moraines of rock debris carried down by ice action subsequent to plucking and frost shattering. Corn Du Corn Du is a mountain immediately to the southwest of Pen y Fan and the second highest peak in South Wales at 873 m (2,864 ft), situated in the Brecon Beacons National Park. The summit itself is marked by a well structured Bronze Age cairn with a central burial cist like that on nearby Pen y Fan. The two summits are visible from great distances
Mount Leuser National Park 100 km wide, and mostly mountainous. About 40% of the park, mainly in the north-west, is steep, and over 1,500 m in elevation. This region is billed as the largest wilderness area in Southeast Asia, and offers wonderful trekking. Around 12% of the park, in the lower southern half, is below 600 m above sea level. Eleven peaks are over 2,700 m. Mount Leuser (3,119 m) is the third-highest peak on the Leuser Range. The highest peak is Mount Tanpa Nama (3,466 m), the second-highest peak in Sumatra after Mount Kerinci (3,805 m). Mount Leuser National Park is one of