Red Lake

Red Lake (Crveno jezero) near Imotski in the Dalmatian hinterland (Croatia) lies in a karst collapse doline, probably formed when the roof of a large cave hall fell in. It takes its name from the reddish-brown cliffs, whose colour comes from iron oxides. The walls rise more than 241 m above the normal water level. The lake surface measures about 2.7 hectares at around 522 m above sea level; the deepest known point lies a few metres below sea level, and the water is roughly 250 m deep.

According to an older visitor report on Showcaves, there is no foot access to the water: you drive to a parapet, park and look down. Cave entrances can be seen in the walls. Blue Lake is only a few hundred metres away, so the two can be combined in one day. Whether an entrance fee is charged is unclear (as of October 2026); check before you go.