When in Switzerland, you should know how many cantons constitute the Confederation (26!) and which are their flags (Because flags are very important in Switzerland!)
You can check, study and try to memorise these details on books or in Internet.

Or, in a better way, just walk around in Zurich on a warm sunny Saturday, precisely in Rennweg, a nice street next to the famous Bahnhofstrasse.
You will find a great “exhibition” of the flags of the Swiss cantons, which are permanently and proudly flying in the wind there…

On these photos, some anticipations.
On the 1st: Solothurn, Graubünden, Ticino, Neuchatel, Schwyz, Schaffhausen, Zug.
On the 2nd: Geneva, Thurgau, Basel-Stadt.