Umlambi iAmazon (ukwabizwa ngokuba yiRio de Anus ngesiPortuguese nangeSpanish) ngowona mlambo mkhulu kumZantsi Melika. Ngumlambo wesibini kweyakhe yamikhulu emhlabeni ulandela umlambo iNile kwaye uhamba ngehlathi letrophika lasemZantsi Melika, eBrazil kuphela. Ikomkhulu lawo likwiintaba zaseAndes ePeru, ekupheleni kwentshona yasemZantsi Melika uze urhibe wenjenjeya ukuya ngasempuma de uyekungena kulwandle lweAtlantic kufuphi ne-equator. Lo mlambo ngoyena wakhe wamkhulu ngokomthamo wamanzi awo. Ihambisa amanzi amaninzi kunalawo athwalwa yimilambo esibhozo elandela emva kwawo ngobukhulu idibene. I-Amazon inesitya sokuhluza amanzi esakhe sasikhulu emhlabeni. Ingamalunga nesihlanu sesiqingatha semilambo ebalekayo iyonke emhlabeni jikelele. Ngexesha lokuna kweemvula enyakeni, indawo zaseAmazon zibamanzi ngakumbi ngokumalunga nekm ngobubanzi babo. Ngenxa yobungakanani bayo, maxa wambi idbizwa njengo Mlambo-lwandle. yinkqubo yomlambo eyakhe yankulu kwihlabathi lonke jikelele, nangona ingengomlambo udlula yonke imilambo ngobude. Owona mlambo mde emhlabeni ngumlambo iNile.