Here are the 10 UNESCO criteria that a site must meet in order to be inscribed on the World Heritage List:
Criterion (i): To be of outstanding universal value from the point of view of history, art, or science.
Criterion (ii): To be an outstanding example of a type of building, architectural ensemble, or technological ensemble or landscape which illustrates a significant stage in human history.
Criterion (iii): To be an outstanding example of a traditional human settlement, land-use, or sea-use which is representative of a culture (or cultures) and is important because of its traditional, architectural or historic value.
Criterion (iv): To be a masterpiece of human creative genius.
Criterion (v): To be an outstanding natural phenomenon or area of exceptional natural beauty and aesthetic importance.
Criterion (vi): To be outstanding examples representing major stages of earth’s history, including the record of life, significant on-going geological processes in the development of landforms, or significant geomorphic or physiographic features.
Criterion (vii): To be outstanding examples representing significant on-going biological processes in the evolution and development of terrestrial, aquatic, and marine ecosystems and communities of plants and animals.
Criterion (viii): To be outstanding examples representing significant natural habitats for in-situ conservation of biological diversity, including those containing threatened species of outstanding universal value from the point of view of science or conservation.
Criterion (ix): To be directly or tangibly associated with events or living traditions, with ideas, or with beliefs, with artistic and literary works of outstanding universal significance.
Criterion (x): To be outstanding examples of a type of traditional human settlement, land-use, or sea-use, which are representative of cultures (or cultures) that are no longer extant.
The criteria are divided into two categories: cultural and natural. Cultural criteria include (i), (ii), (iii), (iv), and (vi), while natural criteria include (v), (vii), (viii), and (ix).
Sites that meet the criteria are inscribed on the World Heritage List. The List is a dynamic list, and sites can be added or removed as their conditions change.