As a Museum
Auschwitz has been transformed into a museum for the purpose of raising awareness and keeping educated about the holocaust and the atrocities committed in that time. They work very hard with preservation having one of the largest preservation departments. They document and watch over all preservation activities and artifacts.
http://www.othervoices.org/2.1/marcuse/tolerance.p... (gas chamber picture)
http://content.time.com/time/photogallery/0,29307,... (entrance picture)
They have turned what was formerly the gas chambers into little viewing rooms. Now there are TVs in there and they play memorial films with narration about what exactly happened. They also have Holocaust testimonies playing from experts and survivors.