I came across this lovely beach in Maine a few months ago, near Bar Harbor. The remarkable thing here is that the beach is very far down – about fifty feet – yet the rocks so strongly resemble typical landscaping gravel that the beach seems to be at the level of the observer. Unfortunately, the beach was surrounded by cliffs and appeared inaccessible at high tide, so we couldn’t get a person among the stones for perspective, but they must be similar to grapefruit and basketballs. (Some among you can no doubt do the math and figure out exactly how big they were – I’ve long forgotten how).
It’s one of the oddest illusions I’ve encountered IRL – I simply could not convince my brain that if I tried to step onto the gravel, I would fall a couple of stories before I finally made contact. Bad visual system! Anyone else run into anything similar?