first cave planned with photographs but science has made great leaps forward since then nikolai punch acuff is developing a three d. model of the underground labyrinth he enters survey data from the tower grosso into a special program the three d. model makes it possible to clarify the relative positions of the caves and to establish their maximum size analysis of the measurements helps determine whether a collapse is likely to happen and that's important not only for the cave but also for the city. we should study the course if occasion occurring in congo or cave it has created such an amazing natural phenomenon that it has become a tourist attraction the course of a cation happening in congo means a lot of money is needed to relocate people to safe places and to build houses on stable earth. according to scientific research two thirds of the city's depressions due to cost of acacia the cracks on this building have been growing for several years now the apartment block is supported by a special construction of iron girders they prevent the walls and ceilings from collapsing cracks are a si