Many trekkers and adventurous mountaineers are drawn to the sight and challenge of the highest mountain in the world within the Sagarmatha National Park. Most fly to the airstrip at Lukla at an altitude of 9,350 feet (2,850m) from where the trek begins to Everest Base Camp at the foot of the ice-covered giant. Highlights en route include the famous Sherpa village of Namche Bazaar and the Tengboche Monastery. By flying in and out, the trek requires about two weeks; it is also possible to walk in, but this requires more time.