The first apse on the left-hand side of the South Temple entry contains another porthole door, which leads to a tiny cloverleaf-shaped room. Check out the incredible pitmark decoration on the stonework — the divots are drilled in horizontal rows, a little like a golfball’s surface. The Mnajdra Temples are made of coralline limestone, which is harder than the Globigerina limestone at Ħaġar Qim. It’s more difficult to carve, but details can be finer and aren’t as susceptible to being worn away by rain and climate changes.