There are remains of many megalithic temples in Malta, and some of them, such as Hagar Qim, Mnajdra, Ggantija, Tarxien and Hypogeum, have been entered on the Unesco List. They did not make a great impression on me, but when I realized that they were created 4500-5000 years ago, i.e. at a time when people were still using stone tools, I felt respect for the technical and organizational skills of their creators. An unexplained mystery is also hidden in Claphan Junction, i.e. 60 cm deep ruts of unknown purpose, carved in the limestone rock.