Sledovik is a most widespread type of sacred stones, venerated in Slavic and Finnic pagan practices. These are big stones, usually granite boulders of glacier origin, with hollows in them, that frequently bear traces of processing, and in some cases resemble foot traces, similar to those that might be left by a bare foot on a soft clay-like surface. It is not completely clear if the stones were selected for veneration because the hollows resembled foot traces, or whether the hollows were processed to resemble footprints; most probably both interpretations are at least partly applicable.