https://thelausanneguide.com/the-hollow-mountains-discover-the-secret-swiss-bunkers/

We’re not talking about chocolate here – though once you visit this bunker you’ll understand the famous candy a bit more. This defense line towards France consisted of 10 kilometers of anti-tank barriers called ”Dragons Teeth” and camouflaged artillery posts. One of these artillery posts is Villa Rosa, a seemingly suburban pink single-family house that hides heavy artillery inside. Only on close inspection, you will see that the windows and doors are dummies hiding the real purpose inside. Bordering the golf course in Gland there is a pleasant walk starting at the villa and then following the line of Toblerones dotted with smaller redoubts.