The Atlas Mountains.
Atlas Mountains definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
mountain system in NW Africa, extending c. 1,500 mi (2,414 km) across Morocco, Algeria, and Tunisia: highest peak (in Morocco), c. 13,600 ft (4,145 m)
Atlas Mountains definition by American Heritage Dictionary
A system of ranges and plateaus of northwest Africa extending from southwest Morocco to northern Tunisia between the Sahara Desert and the Mediterranean Sea and rising to 4,167.8 m (13,665 ft).