Around the world, various natural and cultural heritage sites are protected by UNESCO (United Nations Educational, Scientific and Cultural Organization). The UNESCO World Heritage Program protects areas of outstanding diversity and distinctiveness through its natural or cultural characteristics that are important to all of humanity. The UNESCO World Heritage Program highlights ten criteria, where at least one of which must be met in order for a particular area to be nominated and selected under their protection. Out of four criteria relating to the world natural heritage, criteria (vii) and (viii) are associated with geology and geomorphology. Criterion (vii) highlights the occurrence of superlative natural phenomena of exceptional natural and aesthetic importance, and criterion (viii) emphasizes the geological processes involved in shaping the terrain, current surface processes along with historical geological values. This remarkable site include many of the most spectacular landscapes found anywhere on Earth and are associated with ancient planet times and records of life displayed fossil traces. Among the large number of sites whose outstanding universal value is recognized through criteria for geology and geomorphology, which are on the World Heritage List, this thesis describes NP Plitvice Lakes, NP Pirin, NP Goreme and Cappadocia, NP Grand Canyon, NP Gross Morne, Dorset and East Devon Coast and NP Purnululu. The criteria according to which a natural area can become protected by UNESCO are based on described examples.