It is one of the largest wetlands in Lithuania. Along with the nearby peatland, the marsh spans for over 2500 ha. In this trail, visitors have the opportunity to get acquainted with the marsh, its formation, rare herbs and animals, see the landscape.

The path is waving on a former secret road under water, which was based on stones. In the 18th century this road connected several villages across the marsh. At that time there were almost 2000 inhabitants, who were growing potatoes and other vegetables and transported them to Eastern Prussia for sale, while others worked in peat turbaries. Nowadays, these villages do not exist anymore. Be careful when hiking the trail as the common adder (snake) lives in the marsh.