#12: The Wave (Arizona, USA)
Getting here isn’t easy. Located in a protected wilderness area, this famous sandstone formation requires a permit that’s notoriously hard to get. But the pictures show you why it’s so prized. Wind and water erosion have carved the Navajo Sandstone into flowing, ribbon-like patterns resembling a petrified ocean wave. The bands of red, orange, and yellow swirl together in a dizzying display. It’s a fragile work of art, and its protected status helps ensure it will stay that way for generations to come.

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