Phortse, 3680 metres, Khumbu (Everest) Region, Nepal, Himalayas, Asia

Dudh Pokhari Lake, Gokyo, Solu Khumbu (Everest) Region, Nepal, Himalayas, Asia

A mountaineer packs his bag in preparation to climb Ama Dablam, the 6856m peak in the distance, Khumbu Region, Himalayas, Nepal, Asia

An Everest expeditioner sits among his mountain of equipment while he checks his email with a satelite modem, Khumbu Region, Nepal, Asia

Khumbu (Everest) Region, Nepal, Himalayas, Asia

Ama Dablam and the Khumbu valley, Himalayas, Nepal, Asia

A photographer working in the Everest region of the Nepal Himalayas, Khumbu Region, Nepal, Asia

Thamserku, Khumbu (Everest) Region, Nepal, Himalayas, Asia

Khumbu (Everest) Region, Nepal, Himalayas, Asia

Chorten, Khumbu (Everest) Region, Nepal, Himalayas, Asia

Namche in the Khumbu region, Himalayas, Nepal, Asia

A mountaineer at Ama Dablam Base Camp, Khumbu Region, Nepal, Asia

A lab technician working in a laboratory in a small hospital in Nepal holds a rack of test tubes, Jiri, Solu Khumbu, Nepal, Asia

A lab technician working in a laboratory in a small hospital in Nepal looks into a microscope, Jiri, Solu Khumbu, Nepal, Asia

Signposts to the summits in the snow. Kyanjin Gompa, Langtang Valley trek, Himalayas, Nepal, Asia

Three Buddhist monks carry firewood high above the mountain village of Khare, Khumbu Region, Nepal, Himalayas, Asia

A trekker pauses for a break on the edge of a glacial stream on the way to Mera Peak, a popular trekking peak in the Khumbu Region, near Mount Everest, Nepal, Himalayas, Asia

A climber tackles a difficult boulder problem on the glacial moraine at Tangnag, near Mera Peak and Mount Everest, Khumbu Region, Nepal, Himalayas, Asia

Nepali porter carries a heavy load using traditional wicker basket and tump headband in the lower Hingku Valley, close to Lukla and Mount Everest, Khumbu region, Himalayas, Nepal, Asia

A high altitude porter carries a heavy load using the traditional basket and tump (headband) used by the Nepali porters, under Mera Peak, 6420 metres, a popular trekking peak in the Khumbu region, near Mount Everest, Himalayas, Nepal, Asia

A climber walks towards advanced base camp at 5800 metres on Mera Peak, 6420 metres, a popular trekking peak in the Khumbu region, with Mount Everest beyond, Nepal Himalaya, Nepal, Asia

Trekker crossing a mountain stream, Ama Dablam, 6812m, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

Lingtren, 6697m, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

Trekker crossing a mountain stream, Ama Dablam, 6812m, behind, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

Hoards of trekkers make their way to Everest Base Camp, Mount Everest is the peak on the left, Khumbu Region, Nepal, Himalayas, Asia

Icy meltwater flows down the Chekhung valley with views of Ama Dablam to the left and Taboche to the right, Khumbu Region, Nepal, Himalayas, Asia

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

Everest base camp hiking trail, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Camp 2 on Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Camp 1 on Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

View of Toboche, 6495m, from Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Namche Bazaar, mani stone and prayer flags, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Ama Dablam, 6812m, base camp, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

View of Toboche, 6495m, from Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Tent at Ama Dablam base camp 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

Tent pitched on Ama Dablam with Tobuche, 6495m, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Camp 2 on Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Camp 1 on Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

View of Toboche, 6495m, from Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Himalayan mountain scenery, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Camp 2 on Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Village of Dingboche, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Prayer flags on Ama Dablam, 6812m, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Tent pitched on Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Prayer flags on Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

View of Toboche, 6495m, from Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Camp 1 on Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Namche Bazaar, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Yak on the Everest base camp trail, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Ama Dablam base camp with Tobuche, 6495m, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

View from Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Village of Pangboche, 4000m, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Makalu and other Himalayan peaks near Ama Dablam, 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

Prayer flags on Ama Dablam, 6812m, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Climber on the Yellow Tower of Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

View from Ama Dablam, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Himalayan mountain scenery, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Village of Pangboche, 4000m, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Mountaineer looking towards Everest, Khumbu, Himalayas, Nepal, Asia

Tangnag, Khumbu, Nepal, Himalayas, Asia

Climber bouldering at Tangnag moraine, Khumbu, Himalayas, Nepal, Asia

Tea house, high Khumbu, Himalayas, Nepal, Asia

Mountain landscape with cairn, high Khumbu, Himalayas, Nepal, Asia

Climber bouldering at Tangnag moraine, Khumbu, Himalayas, Nepal, Asia

Trekkers at 5000 metres, high Khumbu, Himalayas, Nepal, Asia

Mani wall, high Khumbu, Himalayas, Nepal, Asia

Makalu and Chamlang from Mera Peak, Khumbu, Himalayas, Nepal, Asia

Mountain landscape with cairn, high Khumbu, Himalayas, Nepal, Asia

Porters pass a mani-wall, high Khumbu, Himalayas, Nepal, Asia

Prayer flags, Khumbu region, Nepal, Asia

Ama Dablam base camp with Tobuche, 6495m, Sagarmatha National Park, UNESCO World Heritage Site, Khumbu Valley, Nepal, Himalayas, Asia

Monk carrying firewood, high in the Khumbu region, Nepal, Asia

Yak on a trail below Kala Pattar and Pumori, 7165m, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

The massive black pyramid summit of Mount Everest seen from Kala Patar with Nuptse the other peak to the right, Khumbu Region, Nepal, Himalayas, Asia

The stunning pointed peak of Ama Dablam, 6812m, seen from Dhukla in the Khumbu Region, Nepal, Himalayas, Asia

Buddhist prayer flags frame Namche Bazaar in the Khumbu Region, Nepal, Himalayas, Asia

Lichen grows on an old Buddhist mani wall (prayer wall) constructed on the trail from Lukla to Tangnag, near Mera Peak, Khumbu region, Nepal, Himalayas, Asia

Huge avalanche, near Tangnag, Khumbu region, Himalayas, Nepal, Asia

Mani stones inscribed with an ancient Buddhist mantra decorate the trail to Everest Base Camp, Khumbu Region, Nepal, Himalayas, Asia

A lab technician working in a laboratory in a small hospital in Nepal holds a rack of test tubes, Jiri, Solu Khumbu, Nepal, Asia

Mani stone, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

Waterfall, Khumbu, Nepal, Asia

Mountain landscape at 5000 metres, high Khumbu, Himalayas, Nepal, Asia

Pine trees glisten in the early morning sunlight in the remote Hingku Valley, near Mount Everest, Khumbu Region, Nepal, Asia

Mountain scenery on flight to Lukla, Solu Khumbu Everest Region, Himalayas, Nepal, Asia

Tents at Island Peak Base Camp, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

Namche Bazaar, on the way to Everest Base Camp, has grown from a traditional mountain village to a bustling trading hub, Khumbu Region, Nepal, Himalayas, Asia

View of Ama Dablam, 6812m, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

Everest Base Camp at the end of the Khumbu glacier lies at 5350m, Khumbu Region, Nepal, Himalayas, Asia

Buddhist prayer flags, Khumbu, Nepal, Asia

River, high Khumbu, Himalayas, Nepal, Asia

Mountain scenery on flight to Lukla, Solu Khumbu Everest Region, Himalayas, Nepal, Asia

Everest Base Camp, a temporary city at 5500m on the Khumbu glacier, Khumbu Region, Nepal, Himalayas, Asia

View of Cholatse, 6440m, from Gokyo Ri, 5483m, Gokyo, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

A view from Thame monastery looking down the Thame valley with Thermserku and Kantega peaks in the distance, Khumbu Region, Nepal, Himalayas, Asia

Tengboche Monastery, Tengboche, Solu Khumbu Everest Region, Sagarmatha National Park, Himalayas, Nepal, Asia

Namche Bazaar is the last town during the trek to Everest Base Camp, seen here with Kongde peak, Khumbu (Everest) Region, Nepal, Himalayas, Asia