After several years of research, the 3D interactive map of the underground world of Budapest has been done. Katalin Zsoldi, doctoral student at ELTE Cartography and Geoinformatics Department published, according to Falanszter blog, the 1:10 000 scale map, her huge accomplishment, “about the real situation of natural and man-made facilities in Budapest, their relationship and about the subsurface depth”, szeretlekmagyarorszag.hu wrote. The Kobanya cellar system is more than 30km-long: