A 60-metre cobblestone alley between two metal screens just off the Reeperbahn, Herbertstrasse is the curiosity of St. Pauli. Two rows of pink-lit ground-floor windows display licensed sex workers; the screens at each end carry signs forbidding entry to women and minors, a Nazi-era ordinance that remains technically on the books and is more or less observed.
It is not a tourist sight in any normal sense — the working women understandably prefer not to be gawped at — but the street is part of Hamburg's awkward, much-discussed approach to regulated sex work and an essential bit of context for the rest of St. Pauli. Walk through if you must; do not photograph, do not loiter, and respect that this is somebody's place of work.