This is a must-see attraction to get a more complete picture of the horrors of Hungary's 20th Century history. This was a house on an upscale street in what was a residential area of Pest that used by the two evil monstrosities of the 20th Century. It was first used by the Arrow Cross, Hungary's indigenous National Socialist (Nazi) Party, then, for a much longer period of time, by the Communists. This time disparity is responsible for the relative amount of space devoted to these horrors. This is not a fun, pleasant experience, but it is definitely a very important memorial. The basement part of the tour is particularly chilling, starting with the elevator descent.