The marsh of Mercallo was born from the lake Comabbio, also called lake Corgeno It is located between the towns of Comabbio and Mercallo One of the possible ways to visit the area is to walk on the beautiful pedestrian path that with about 12 kilometers allows you to visit the entire lake Comabbio Example of eutrophic lake in late autumn.
The swamp of Mercallo is also an important archaeological area where piles of Celtic origin were found. In the territory of the same municipality, behind Sesto Calende, in the chestnut and conifer woods, you can come across large erratic boulders, which were moved during the last Ice Age, about 60,000 years ago, from the slopes of the Simplon and Gotthard rivers.
