The Toblerone line is a 10 km long defensive line made of "dragon's teeth" built during the Second World War between Bassins and Prangins, in the Canton of Vaud, Switzerland. These lines of defensive blocks can be found all over Switzerland, though more commonly in border areas. Their purpose was to stop tank invasions. The 2,700 9-ton concrete blocks that make up the defences are similar to the shape of the Toblerone chocolate bar, which gave its name to the line. Since the line has been left to nature since its construction, it was decided to keep these concrete blocks and to make a hiking trail along their route.
- Muehlemann, Anetka (9 June 2008). "Ligne fortifiée, un témoin du passé à valoriser" (in French). 24 Heures, Edipresse, Switzerland. Retrieved 9 August 2009. CS1 maint: discouraged parameter (link)
- Bradley, Simon (13 September 2006). "Villa Rose opens doors to toblerone ramblers". Swissinfo. Retrieved 9 August 2009. CS1 maint: discouraged parameter (link)