Gabion walls don't need any kind of drains because they are porous throughout. Gabions can be customized to make them more useful in public spaces. Gabions can be filled with any heavy material--diverse stones, metal artifacts, obtanium, etc.
Concrete wall cladding panel like this adds texture to these kitchen area. The colour of this concrete helps the softness that the existing colour scheme has and the contrast with the dark chairs and the benchtop.