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  1. There are 25 World Heritage Sites in the United States; 21 are single location sites, and 4 are multi-part sites encompassing several locations (the Frank Lloyd Wright buildings, the only site with widely spaced properties, are in blue).

  2. The first sites in the United States added to the list were Mesa Verde National Park and Yellowstone National Park, both at the second session of the World Heritage Committee, held in Washington, D.C., in 1978. The most recent site listed is the Hopewell Ceremonial Earthworks in 2023. The 25 sites are located in 22 states and two territories.

  3. World Heritage Fund, States Parties Contributions. International Assistance. State of Conservation. Periodic Reporting Questionnaire 2008-2015. Periodic Reporting Questionnaire 2018-2024. Europe and North America, World Heritage Convention Regional Contact. Europe and North America, World Heritage Regional page.