Ouvrage Rimplas - Credit: Wikimedia Commons
Ouvrage Rimplas is a work (gros ouvrage) of the Maginot Line's Alpine extension, the Alpine Line, known also as the Little Maginot Line. The ouvrage consists of one entry block, two infantry blocks and three artillery blocks at an altitude of . It was the first ouvrage of any portion of the Maginot Line to be completed, in 1928. The ouvrage features an aerial tram entrance. Read more on Wikipedia
Source: en.wikipedia.org