- Achille Campagnoni, Lino Lacedelli
- Pakistan (Karakoram)
The first successful ascent of K2, which at 8,611 m (28,251 ft) is the world's second highest mountain, was achieved by Achille Compagnoni and Lino Lacedelli (both Italy) on 31 July 1954. They were members of an Italian expedition led by Ardito Desio. K2 is situated in the Karakoram range on the border between Pakistan and China.