8. The Wave, Arizona
There’s an optical illusion in Arizona too! One patch of Vermilion Cliffs National Monument is a sandstone rock structure known as The Wave, which can mess up even experienced hikers’ sense of perception.
The formation of this breathtaking rock formation began 190 million years ago when desert dunes solidified and compacted into stripped sandstone. The process is called wind erosion, and it’s what gives these rocks the appearance of colorful ocean waves. Well, that’s basically the optical illusion here: the wavy, misleading rocks create a view that often makes hikers lose their balance.
Those planning to visit The Wave may want to know there’s a lottery system that grants a very limited number of daily permits.