As soon as I parked the car along the steep roadside, Lucas said "What's that stink?!" The rotten egg smell helped Lisa guess... natural hot springs. The Bagno San Fillipo have been there for eons... Roman Caesars and popes have bathed in their sulfur hot waters. Since we parked our car right above the first 100 foot tall stalegmite-like snow white formation, the steamy stench made Lucas pull up the neck of his shirt over his suffering nose. It really smelled like rotten eggs. He decided maybe this was a good cover for his farts. I couldn't tell.
We hiked down into the gorge and found this formation... and a much larger one beyond--two tiered and stepped. Picture white cream puff mountain steaming. Streaks of colors here and there. We didn't go in ourselves but the water was like a warm bath--some areas are much hotter than others. Many local Italians bathe here for curative effects. All I know is what I read... wear old bathing suits because you will never lose that stink. We talked to an Italian couple who were bathing there and they said it wasn't as hot as a few months ago. There is a proper spa in town that gets the waters piped in directly from these springs.
Italy is a volcanic land after all... This was a fantastic off the beaten path sight to see. This country is full of natural wonders. The geology of the place staggers me.
Next... same day, a castle tower on mountaintop...