Are there still concentartion camps

Though the camps do not serve the same purpose that they did in the war (thank God!), there are many camps that are still standing as memorials to those who lost their lives there and as reminders of the atrocities that took place there so that they may never happen again.

Some of these are:

Auschwitz (Poland)
Mauthausen (Austria)
Treblinka (Poland)
Theresienstadt (Terezin) (Czech Republic)
Buchenwald (Germany)
Dachau (Germany)
Flossenburg (Germany)
Sachsenhausen (Germany)
Stutthof (Poland)
Majdanek (Poland)
Bergen-Belsen (Germany)
Ravensbruck (Germany)
Chelmno (Poland)

These camps existed for various reasons (they were not all extermination camps) and exist currently in various states: some maintain parts of the original camps, some have models, and some are simply memorials at camp sites.

Parts of Auschwitz, Buchenwald and Dachau have been preserved as major museums.

Note. If you are planning to visit any of the former camps listed above it is best to check out beforehand what is actually there. In many cases there is little more than a memorial, while some are large museums.