Rosh Hanikra Grottoes is one of the most fascinating geological formations in Israel. It is located on the border between Israel and Lebanon, on the coast of the Mediterranean Sea. Rosh HaNikra grottoes are cavernous tunnels formed by sea action on the soft chalk rock. The total length of the tunnels is some 200 meters. The 400 meters long tunnel dug in 1968 between the grottoes and slightly above sea level allowed easier access, and soon after a cable car was built to take visitors down from the top of the cliff to the tunnels. With a 60-degree gradient, this cable car is advertised as the steepest in the world.