Abstract: This research is the first part of the article, in which, based on the analysis of historical precedents, a study of the procedure for excluding UNESCO World Heritage sites from the corresponding World Heritage List is conducted. The authors highlight common problems in the protection of World Heritage sites, the interpolation of which in relation to such a World Natural heritage site as Lake Baikal creates prospects for preventing the occurrence of the most negative consequences. A detailed analysis of the difficulties in the conservation of World Heritage sites, which lead to the exclusion of objects from the World Heritage List, based on world experience, is proposed. In the work, one of the problems of preserving World Heritage sites, which served, in particular, as the main reason for the exclusion from the List of such an object as the Arabian Antelope Reserve, is called insufficient certainty, as well as insufficient clarity in establishing the boundaries of World Heritage sites. The authors substantiate this thesis and draw a conclusion about the importance of strict compliance by the participating countries with the norms formed in the main relevant international documents. In addition, it is noted that the exclusion of an object from the UNESCO World Heritage List may lead to the appearance of non-compliance of the object with the criteria of outstanding universal value.