The Eiger is a mountain in the Alps of Switzerland. It is the easternmost peak of a ridge-crest that extends to the Mönch (4,099 m) and across the Jungfraujoch to the Jungfrau (4,158 m). The peak is mentioned in records dating back to the 13th century but there is no clear indication of how exactly the peak gained its name. The three mountains of the ridge are sometimes referred to as the Virgin (Jungfrau, lit. "Young Woman"), the Monk (Mönch) and the Ogre (Eiger). The name has been linked to the Greek term akros, meaning "sharp" or "pointed", but more commonly to the German eigen, meaning "characteristic".
The first ascent of the Eiger was made by Swiss guides Christian Almer and Peter Bohren and Irishman Charles Barrington who climbed the west flank on August 11, 1858.
The Jungfraubahn railway runs in a tunnel inside the Eiger, and two internal stations provide easy access to viewing-windows in the mountainside.
In July 2006, a piece of the Eiger, amounting to approximately 2 million cubic meters of rock, fell from the East Face. As it had been noticeably cleaving for several weeks prior and it fell into an uninhabited area, there were no injuries and no buildings were hit.