The best reason to visit Timna Park, however, is to see its multi-coloured sandstone rock formations, fantastically shaped by desert erosen.
There are no sandstone rock formations in Timna Park.  
mnli hypothesis: There are no sandstone rock formations in Timna Park.   premise: The best reason to visit Timna Park, however, is to see its multi-coloured sandstone rock formations, fantastically shaped by desert erosen.