This chapter shows the possibilities of rational (instrumental) interpretation of the primary functions of prehistoric cultural heritage sites using the example of stone labyrinths located on the shores of the White Sea in the Republic of Karelia. It is shown that the meridian-oriented labyrinth pattern can be used as a dial of a sundial-calendar. To do this, a gnomon, an object that casts a shadow, must be installed in the center of the labyrinth. The area covered by the shadow in one year has the shape of a labrys. Geographical methods of heritage research open up new possibilities: they allow us to consider the connection of ancient signs and images with the measurement of space and time; they can be a source of information about the tilt of the earth's axis and gravity. It is advisable to create a geodatabase on the labyrinths of Europe.