My Echeveria plant has a hollow space in the center under its leaves but it is not empty inside there. Some birds have chosen to build a nest in the interior. I saw one bird land and hop over to the side of the plant, look around for anyone watching, then hop inside the opening. I am afraid to be seen hanging around near the Echeveria because I worry I will scare the birds away and the nest will be abandoned.  Recently made a visit to Joshua Tree National Park, with my daughter, and enjoyed many different views empty of people but not empty of interesting rock formations, Joshua trees, and different varieties of cacti like ocotillo, cholla, and others whose names are unknown to me. The rock formations gave the impression of prehistoric times, cavemen with their blocks of stone, Fred Flintstone at work in his quarry.

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According to the National Park Service post about the geological formations the stones are monzogranite and were formed over 100 million years ago.

Short Video about Rock Formation at Joshua Tree

Stream of Consciousness Saturday is hosted by Linda G Hill. Prompt for today empty/hollow.