There is barely one visitor of Zürich who is not visiting the Bahnhofstrasse as well.
Barely any visitors to Zürich do not also visit the Bahnhofstrasse.
Almost all visitors to Zürich also go to the Bahnhofstrasse
- “visitor to” not “visitor of” (inhabitant of, visitor to)
- the continuous form “is not visiting” is not appropriate in this statement of generality