10 most difficult alpinism riddles

Reinhold Messner is an Italian mountaineer, from the Italian province of South Tyrol. He made the first ascent of Mount Everest without supplemental oxygen, along with Peter Habeler, and was the first climber to ascend all fourteen peaks over 8,000 metres (26,000 ft) above sea level.

The Annapurna peaks are among the world's most dangerous mountains to climb, although in more recent history, using only figures from 1990 and after, Kangchenjunga has a higher fatality rate. By March 2012, there had been 191 summit ascents of Annapurna I Main, and 61 climbing fatalities on the mountain. This fatality-to-summit ratio (32%) is the highest of any of the eight-thousanders. On October 2014, at least 43 people were killed as a result of snowstorms and avalanches on and around Annapurna, in the Nepal's worst ever trekking disaster.

The Seven Summits are the highest mountains of each of the seven continents. Climbing to the summit of all of them is regarded as a mountaineering challenge, first achieved on 30 April 1985 by Richard Bass. In 1986, the Canadian mountaineer Patrick Morrow became the first man to climb the Seven Summits in the Carstensz version

Tirich Mir (7 708 m) is the highest mountain of the Hindu Kush range located in Chitral District of Pakistan. The mountain was first climbed on 21 July 1950 by a Norwegian expedition consisting of Arne Næss, P. Kvernberg, H. Berg, and Tony Streather.

K2 is the second highest mountain in the world, after Mount Everest,It is on the border between China and Pakistan. K2 is known as the Savage Mountain due to the extreme difficulty of ascent. It has the second-highest fatality rate among the eight thousanders. With around 300 successful summits and 77 fatalities, about one person dies on the mountain for every four who summit.

The most notable feature of the Eiger is its 1,800-metre-high (5,900 ft) north face of rock and ice, named Eigerwand or Nordwand, which is the biggest north face in the Alps. The Eiger has been highly publicized for the many tragedies involving climbing expeditions.

The Southern Alps is a mountain range extending along much of the length of New Zealand's South Island, reaching its greatest elevations near the range's western side. Its tallest peak is Mount Cook, the highest point in New Zealand at 3,724 metres.

K2 is not in the Himalayas, but the Karakoram Range. It is also one of the most remote of the world's highest peaks (hence lack of local name).

Two characteristic peaks of Mt Elbrus have two volcano craters. The eastern peak has an enormous crater 250m in diameter.

Sometimes referred to as the Mountain of Mountains, the Matterhorn has become an iconic emblem of the Swiss Alps and of the Alps in general. Since the end of the 19th century, when railways were built in the area, the mountain has attracted increasing numbers of visitors and climbers. Each year, numerous mountaineers try to climb the Matterhorn.