Swiss have their own version in the western part, called now Toblerone line, built after WWI. Now a tourist attraction with hike paths around them, each block weighting 9 tons (and it runs 10km straight up to Jura mountains), the line basically cutting off westernmost part of country (basically Geneva) off the rest.
They don't treat it as something ancient though, there is also modern part of it integrated into road [1], but nothing I could notice on highway though. Bear in mind this would protect Switzerland from an attack from France, which these days seems... unprobable.
They don't treat it as something ancient though, there is also modern part of it integrated into road [1], but nothing I could notice on highway though. Bear in mind this would protect Switzerland from an attack from France, which these days seems... unprobable.
[1] https://commons.wikimedia.org/wiki/File:Toblerone_Line_road_...