Hanging off the side of a cliff! Nestled in a rock!
Ferocactus cylindriceus, also known as F. acanthodes or California Barrel Cactus or even Miner’s Compass (because it always leans to the South.)
In case you were wondering, I also had to climb up the cliff to get that picture. No tricks were involved.
And next to it was this cute little baby cactus! Also growing in rock.