lf to compare canyons world-wide, Blyde River Canyon is one of the largest canyons on Earth, and it may be the largest 'green canyon' due to its lush subtropical foliage. It has some of the deepest precipitous cliffs of any canyon on the planet.
It is the second largest canyon in Africa, after the Fish River Canyon, and is known as one of the great wonders of nature on the continent. The average depth is 762 meters while the deepest point can reach 1.372 meters.
Possibly the best view in the whole of the Blyde River Canyon is of the "Three Rondavels", huge, round rocks, thought to be reminiscent of the houses or huts of the indigenous people, known as rondavels. This canyon is part of the Panorama Route. This route starts at the town Graskop and includes God's Window, the Pinnacle and Bourke's Luck Potholes.
The Blyde River Canyon supports large diversity of life, including numerous fish and antelope species as well as hippos and crocodiles, and every primate species that may be seen in South Africa (including both greater and lesser bushbabies, vervet monkeys and Samango monkeys).
The diversity of birdlife is similarly high, including the beautiful and much sought Narina trogon as well as species such as the Cape vulture, black eagle, crowned eagle, African fish eagle…
According to en.wikipedia