Kastri is an archeological site, which is interesting to visit in its own right. The climbing is in 3 sectors. The left hand sector, Kreissaal, is mostly slabs. The middle and main section has an ancient fortress dating back to the 4th century BC. It contains many excellent routes, both slabs and steep walls. The right hand section, Sophie, is less interesting, but nevertheless has a dozen or so routes, of varying quality. The sun reaches most of the sectors between 11.00 and 12.00, although one or two of the steep walls stay in the shade a little longer.