Kilchberg is a town in Switzerland and part of the greater Zürich area: the canton of Zürich. It's just a short train ride from Zürich's central station. I recognized the name of the town because I've been there before. The Lindt & Sprüngli headquaters is in Kilchberg and we stopped by while in Zürich... maybe 15 years ago. Unfortunately they don't offer tours at Lindt but we did manage to get some free chocolates.