Spain has the Caminito Del Rey, Switzerland has the Torrent Neuf.
The latter is a 15th Century, suspended water leat system which was used to divert water from glaciers to otherwise dry valleys. Per the BBC, some 200 such systems spanning 1,800km in length still operate. One such systems is the Torrent Neuf. Initially put out of service in 1935, it was restored in 2013 as a tourist attraction.