8. Echidna Chasm, Australia
Situated in the popular Purnululu National Park, Echidna Chasm is a narrow, steep gorge. It is 200 meters (656 feet) high and as narrow as one meter (three feet) in some areas. The chasm is especially beauteous when the daylight shines down in between the red rocks. The chasm is only a two-kilometer (1.2 mile) return walk from the Echidna parking lot.
9. Witches Gulch, USA
Witches Gulch is situated in the Wisconsin Dells of the Wisconsin River. The rock walls have an interesting, undulating shape. It’s believed to have happened during the last ice age when the state’s glacial lake flooded out from its dam. You can only see it by boat. The best time to visit is from April through September when it’s warmer.