they look good but if were allowed to comment then i think you should add a few more pieces around them and slanted against them so they look more ntaural than man made if ya kno what i mean.
Ha ha already beet u to that one me and the wife decided with the cave on the right were bringing it forward adding a larger rock behind it then some smaller ones on top but not doing anything with the one on the left as it blends in with the root.