If you Just flew into Switzerland, non.
Switzerland
Yes, provided Switzerland is the first Schengen country you intend to visit.
1
No
Yes , Switzerland is part of the Schengen Area. Schengen visas are valid.
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Interlaken,Lausanne,Geneva,Zurich,Zermatt
Lachen is a municipality in March District in the canton of Schwyz in Switzerland. Therefore, in order to visit Lachen, one must to travel to Switzerland first.
A lot of mountains & a lot of railroads.
Bern and Geneva are both in Switzerland.
Personally, I think Switzerland