The letter A?

atlantic city,arkansas, argentina,andes mountains,albuquerque, amsterdam, antartica, algeria, atlantic ocean,angola, asia, africa, albania, albany, alps., alaska, amazon river, amazon forest, augusta, annapolis, alabama, america, amur river, altai mountains, aral sea, astana, austrailia, ashkhabad, azerbaijan, algeirs, african republics, atlanta, atacama dessert, andorra, adriatic sea, austria, apennines mountains, ahaggar mountains, afganistan, adelaide,amery ice shelf, antartic pennisula, alexander isthmus, anadyr range, amundsen sea.