If there is one place in the Zagora you absolutely must visit then it’s Imotski, an old Venetian town on the Hercegovinian border that is renowned for the two natural wonders on the edge of town, the Blue Lake (Modro jezero) and the Red Lake (Crveno jezero). Both of them are dramatically deep depressions formed by the collapse of limestone caves, and filled with water – the level of which rises and falls depending on seepage and seasonal conditions. Extraordinarily beautiful in real life, but difficult to convey in two dimensions, the Imotski lakes are really something you have to go and see yourself.