There is some other kinds of rock out there. I don't know if it was limestone, cause I haven't really climbed much of it. But the stuff I was finding was more good for bouldering traverses or the kinds of problems you let go once it ends. Some V6-8 problems, and I had one really hard project. Probably all regrown and dirty again and I don't even remember where it was totally. That said... it isn't really worth it!