22. Blyde River Canyon, South Africa

Blyde River Canyon is 50 kilometers (31 miles) long and features rocky pools, verdant slopes, and a range of wildlife. This is reported to be the place where the ancient continent of Gondwanaland broke apart over 200 million years ago.

Stay at the little village of Graskop. Hike one of the nearby trails. You can also go white-water rafting.

23. Zebra Slot Canyon, USA

You’ll discover Zebra Slot Canyon near Escalante in Utah. This canyon is 300 feet long and, in some sections, only 10 inches in width. Some hikers turn back because they get claustrophobic. The trail begins at Hole in the Rock Road then gradually descends into Harris Wash, where you’ll come to the canyon’s mouth.