These succulents were rooted from discarded plant material I found on my travels and once they flower it might be possible to identify them. The dark green fleshy foliage shows well against the warm colours in the local stone.
This is an example of an aloe plant that somebody else discarded. When I found it it was just a broken stem but after six weeks has developed a healthy root system. The flowers when they come are quite striking orange spikes on a yellow base not unlike the red hot poker plant.