Grotta Tanaccia in San Marino, San Marino
Grotta Tanaccia is an ancient rock niche on the edge of Monte Titano, located just outside the city walls near Montale Tower. The niche in the cliff face of Monte Titano, cave feels too grand a word for what you'll find, saw active use as a place of worship from the second Iron Age, through the Roman period and to the late-antique period. Grotta Tanaccia is therefore considered the oldest…
We haven't written up this one. Atlas Obscura has the full story — the link below goes straight to it.
