Outdoor Living Space - Mediterranean - Patio - other metro - by Wendy Zolezzi Design. Maybe external tiles a bit like this . darker colour like the ones they use on old colonial buildings, with pebbled grouting between tiles.
Delightful variation on the conservatory - a hexagonal wall of arched windows under a glass doomed roof with quarry tile floor makes for an intimate dining room. Maybe mirrors could be used in lieu of windows?
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.