The Western Cwm is traversed by climbers using the southeast route to the summit of Everest and is typically accessed by climbing through the Khumbu Icefall. The central section is cut by massive lateral crevasses which bar entrance into the upper Western Cwm. In this section, climbers must cross to the far right, over to the base of Nuptse, to a narrow passageway known as the Nuptse corner. From there, climbers can see the upper of Everest—the first glimpse of Everest's upper slopes since arriving at Base Camp.