Blyde River Canyon

Blyde River Canyon in Mpumalanga, South Africa may not be the largest on Earth, but it does have the distinction of being one of the greenest. As well as boasting an average depth of 2,500 feet (762 m), this 16-mile (26 km) long gorge is covered in abundant subtropical plant life. The deepest part of the canyon is said to be from the top of Mariepskop mountain down to the river’s exit, with a total drop of 4,500 feet (1,372 m).