The Lourdes Grotto above St. Martin is a Marian grotto that was built around 1912. It was designed similar to the model in Lourdes (France). A place of silence and devotion in the middle of the forest about 10 minutes from Kropsburg. Directions: You can reach the (somewhat steep) path to Kropsburg via Kreuzweg, Kellereistraße or Haardtgasse. From Kropsburg, the route then leads into the forest, the grotto is signposted.