It is significant for the ruins of one of the 19th century's largest ice harvesting factories and the occasional outflow of water in two directions.
The lac de Sylans fills part of the Nantua water gap, which was formed during the last glacial era. The formation of the lake itself is much more recent; it is the result of the collapse of the cliff on the Northern side of the valley a few centuries ago. This huge landslide partially blocked the valley between the ice factory and the source of the Doye, above les Neyrolles, blocking the river that was flowing along what is now the bed of the lake, causing the lake to form. Today the water percolates through the landslide debris to form the source of the Doye.
Source: Wikipedia.org
Copyright: Creative Commons 3.0
Address: Rhône-Alpes, France
Statistics
Select one of the most popular activities below or refine your search.
Discover the most beautiful and popular trails in the area, carefully bundled into appropriate selections.
Source: Jejecam
Copyright: Creative Commons CC BY-SA 3.0
Select one of the most popular categories below or be inspired by our selections.
Discover the most beautiful and popular attractions in the area, carefully bundled in appropriate selections.
Source: Jejecam
Copyright: Creative Commons CC BY-SA 3.0
With RouteYou, it's easy to create your own customised maps. Simply plot your route, add waypoints or nodes, add places of interest and places to eat and drink, and then easily share it with your family and friends.
Route planner

<iframe src="https://plugin.routeyou.com/poiviewer/free/?language=en&params.poi.id=1298106" width="100%" height="600" frameborder="0" allowfullscreen></iframe>
© 2006-2026 RouteYou - www.routeyou.com