Varosha (or Marash) is an area in North Cyprus by Famagusta (or Magusa) that has been closed to the public since the Turkish Occupation in Cyprus in 1974, until very recently, Oct 2020. If you are not familiar with Cypriot history the link below is a pretty good explanation, it runs for 14 minutes but explains the situation here in Cyprus fairly accurately and simply. https://youtu.be/WHlHnCwFp5c
For more information on this actual areas visit https://en.wikipedia.org/wiki/Varosha,_Famagusta