Trekkers look up at Everest, the distant peak on the left, with Nuptse and Lhotse, Khumbu Region, Himalayas, Nepal, Asia

Mount Everest, Nuptse and Lhotse, seen here from Gokyo Ri, Khumbu Region, Nepal, Himalayas, Asia

Ama Dablam, 6812m, Nuptse and Lhotse mountains, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Ama Dablam, 6812m, Nuptse and Lhotse mountains, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

A view of Mount Everest, distant peak to the left behind the Nuptse-Lhotse ridge, from Kongde, Khumbu Region, Nepal, Himalayas, Asia

Mount Everest, Mt. Nuptse, left, and Mt. Lhotse, right, from the Gokyo Ri, Khumbu, Sagarmatha National Park, Nepal, Asia

View from Gokyo Ri (5360) towards Mount Everest (8850), Nuptse (7861), Lhotse (8501) and Makalu (8463), Sagarmatha National Park, Khumbu Himal, Nepal

View from Gokyo Ri (5360) towards Mount Everest (8850), Nuptse (7861), Lhotse (8501) and Makalu (8463), Sagarmatha National Park, Khumbu Himal, Nepal