Sledovik
Sledovik (Следовик, in Russian literally – footprint thing) is a most widespread type of sacred stones, venerated in Slavic (Russian, Belarusian, Ukrainian) and Finnic (Karelia, Merya) pagan practices. These are big stones, usually granite boulders of glacier origin, with hollows in them, that frequently bear traces of processing (seem to be artificially deepened and/or widened), and in some cases resemble foot traces, similar to those that might be left by a bare foot on a soft clay-like surface (hence the name).