Grottes et Préhisto-Parc - 4 Things to Know Before Visiting

The Doubs Regional Nature Park extends over more than 40 kilometers in the cantons of Jura, Neuchatel, and Bern and includes 16 communities. Recognized by the federal authorities as a regional nature park of national importance, the Parc du Doubs is intended to ensure the preservation and sustainable development of its territory with regard to the environment, patrimony, and population.

Porrentruy Castle is a castle in the municipality of Porrentruy of the Canton of Jura in Switzerland. It is a Swiss heritage site of national significance. the castle served as exile residence of the prince-bishops of Basel from 1527 until 1792. The bishops had been exiled from Basel during the Swiss Reformation in 1529, whereas they were able to keep most of their territories outside the city.

The Étang des Royes is a pond in the municipality of Saignelégier in the canton of Jura. It is considered the smaller brother lake of the more famous Étang de la Gruère and lies at 964 meters above sea level. The pond is embedded in a forest in the Freiberg Mountains, is under nature protection and is part of the Doubs Nature Park.

A nature reserve of national importance, the Etang de la Gruère is a haven of peace and a true paradise for nature lovers. The path around the lake invites you to discover its special flora and fauna. The lake and the surrounding bog is a nature preserve. The lake was formed in the 17th century, when a dam was built for a mill.

A Jura hole stone is a natural stone found in the Jura mountains of France. They are light beige in color and have many cavities. They come from the petrified sea deposits caused by tectonic shifts between mountains. The bizarre form and many cavities are caused by erosion over thousands of years.

The Allaine is a 65 km long river in northwestern Switzerland and eastern France. Its source is above the village Charmoille, in the Swiss Jura mountains. Downstream from its confluence with the Bourbeuse and the Canal du Rhône au Rhin, near Méziré, it is called the Allan. It is a right tributary of the Doubs, which it joins a few km downstream from Montbéliard, where it takes the Savoureuse with it, a river with its sources in the southern Vosges.