The article deals with the construction of historical non-mining underground spaces built by a barrel vault and their possible use in geotourism. The article describes and presents a graphical reconstruction of the construction of underground spaces for non-mining reason in the Middle Ages and younger periods. Medieval underground spaces built for non-mining purposes were rare in Slovak territory. They were usually built as cellars or underground passages under castles. Cellars in historical towns are currently used as restaurants or various shops for tourism reasons. Suitable adaptation and description of the underground may lead to more effective advertising and a better utilization of these spaces in terms of geotourism.

Keywords: historical non-mining underground spaces, barrel vault as an element of historical underground construction, geotourism