Unique Geologic Formations/ Features Caused be Erosion

Arches, caves, hoodoos, sea stacks, erratics, from places like Monument Valley, Lava Tubes NP, Brice Canyon, the Washington coastline and Yosemite NP. Your entry should not be just another "pretty mountain" shot, and, for this challenge, let's exclude the Slot Canyon shots (Since they are usually the winners in this type of challenge) So, No slot canyons and No "pretty mountain" shots. Look at my examples, title/name of location is required. Read the rules, submit a shot that shows how erosion creates unique geologic formations. Is a shot of Half Dome acceptable? Not if it is a full valley/mountain scene, but if the focus is on how the dome was cut in half, then yes, it would be. This is subjective and the voters are usually good at judging this type of criteria. I'll DQ the objective stuff, and will try to send letters of concern to those I consider questionable.