15 world tallest mountains ► 1. Mount Everest Mount Everest or Qomolangma is the Earth’s highest mountain, with a peak at 8,848 metres (29,029 ft) above sea level. It is located in the Mahalangur section of the Himalayas. The international border between China and Nepal runs across the precise summit point. ► 2. Aconcagua Aconcagua is