Shell design carved from limestone containing fossilized shells. Nice. From a well at a residence that is now Les Musées Gadagne, Lyon, France. #limestone #shells #bivalves #stones #mollusc #mollusk #architecture #art #gadagne #lyon #france #travel

Lyon mystery: I initially thought this was an outdoor oven for baking very long baguettes, but the passage extends far into the hill at a slight incline so I'm wondering whether it is a water catchment gallery. The area is apparently riddled with them, some serving to drain the soil and prevent mudslides and building collapses (like the one that killed 40 in 1930), others to provide water for domestic use or fountains. Some catchments are early Roman but I have no idea when this one was built. Kind of strange there was no sign for curious tourists. Maybe it's just totally obvious to residents. Café Gadagne, Fourvière Hill, Lyon. #lyon #roman #architecture #water #archaeology #aquifer #gadagne #france #travel #fourvière #geology https://maps.app.goo.gl/A85MmHFPgg3VoqZE8