What is the name of the canyon carved by the Green River in Utah?

Which river carved out the Taroko Gorge canyon in Taiwan? In which country is the Colca Canyon located? Which canyon is known for its unique slot canyon formations? What is the name of the famous canyon in South Africa, known for its lush vegetation? In which country is the Tiger Leaping Gorge canyon located? In which mountain range is the Colca Canyon located? What is the name of the canyon in Arizona known for its Navajo ruins? In which country is the Cotahuasi Canyon located?