We spotted this big fallen log on a property with acreage (pictured above). The owners liked the natural feel to the fallen log. Instead of having it hauled away, it is now repurposed as a planter for an assortment of succulents.
This would also work in a xeric-garden setting, where a smaller log could create the same natural care free feeling. Succulents are a low maintenance plant, and they keep reproducing themselves. There are endless possibilities and boundless varieties of succulents.