Fretka – Skály u Šemanovic on Clmb House. Venue in Skály u Šemanovic, Šemanovice, Kokořínsko, Czechia. Fretka is an individual climbing rock in Skály u Šemanovic, Šemanovice, Kokořínsko, Czechia. The ČHS record includes traditional sandstone climbing. The ČHS...