Last updated on July 29th, 2022
References
- https://whc.unesco.org/en/list/75/
- https://www.smithsonianjourneys.org/blog/world-heritage-grand-canyon-national-park-180950740/
- http://sevennaturalwonders.org/world-seven-wonders/grand-canyon/
- https://www.treehugger.com/the-natural-wonders-of-the-world-4864153
- http://www.ohranger.com/grand-canyon/grand-canyon-geology
- https://www.nps.gov/grca/learn/nature/plants.htm
- https://www.nps.gov/grca/blogs/grand-canyon-some-thoughts-on-color-and-light.htm
- https://www.britannica.com/place/Grand-Canyon
- https://www.doi.gov/blog/13-things-you-didnt-know-about-grand-canyon-national-park
- https://www.azcentral.com/story/travel/arizona/grand-canyon/2019/02/26/100-facts-about-arizona-grand-canyon-to-celebrate-the-national-parks-centennial/2714998002/
- https://www.azcentral.com/story/travel/arizona/grand-canyon/2019/02/22/grand-canyon-pioneers-powell-kolb-harvey-colter/2782343002/
- https://www.mentalfloss.com/article/72416/11-things-you-might-not-know-about-grand-canyon
- https://www.redbull.com/ke-en/river-rafting-best-destinations
- https://www.nationalgeographic.com/travel/river-dance-rafting-the-grand-canyon/
- https://www.azcentral.com/story/travel/arizona/grand-canyon/2016/04/10/national-parks-centennial-grand-canyon/82129944/
- https://www.tripadvisor.com/ShowUserReviews-g143028-d4136980-r504743166-Shoshone_Point-Grand_Canyon_National_Park_Arizona.html