The Siren Pharmacy

Tucked on the street linking Campo dei Fiori to Piazza Navona, this historic pharmacy is easy to miss if you don't look up above the shopfront for their sign. It's tied to the Ancient Pharmacy of Santa Maria della Scala, considered one of the oldest pharmacies in Europe — so there's real history behind the counter. Pick up their Discovery Kit of house perfumes; it's one of those genuinely local souvenirs you won't find at every tourist stall.