Globally speaking, there are more than one thousand sites listed in the UNESCO World Heritage List. The majority of the sites are cultural heritage sites. Some sites fulfil the criteria required from both cultural and natural sites. Such sites are said to represent mixed properties. A site can also include one or more individual sites. Such sites are called serial sites. If a site is located in more than one country, it is said to be a cross-border site. 20–30 sites are added to the list every year. The milestone of one thousand sites was achieved in 2014.
The World Heritage Centre website includes the updated number of sites and the grounds for including each site in the list.