[Itinéraire] Des Aventures Fankarstiques Cette boucle JURASSIC VELO TOURS de 34 km est une d&eacute;couverte des ph&eacute;nom&egrave;nes g&eacute;ologiques du massif du Jura. Sur le plateau de Frasne, Courvi&egrave;res et Boujailles. Gouffres, dolines, lapiaz, belv&eacute;d&egrave;re, moulin et fontaines vous attendent pour vous raconter leur histoire...<br />L'ensemble du parcours suit les liaisons douces intercommunales. Arr&ecirc;tez-vous dans le bois de Billin pour admirer la grande doline, la galerie &agrave; ciel ouvert, le gouffre de Billin. Continuez votre chemin jusqu'&agrave; Courvi&egrave;res pour admirer les dentelles des lapiaz et son myst&eacute;rieux moulin &agrave; vent. A Boujailles, c'est l'histoire de l'eau et des zones humides qui vous est racont&eacute;e, de l'&eacute;tang des &eacute;tarots aux fontaine du village. Revenez par la ferme de Cessay o&ugrave; vous pourrez suivre le parcours d'interpr&eacute;tation du sentier de Cessay pour d&eacute;couvrir l'&eacute;cosyst&egrave;me de la for&ecirc;t.Modifié: 35 semaines 858.0 858.0 858.0 858.0 858.0 858.0 859.0 859.0 859.0 860.0 860.0 860.0 860.0 860.0 859.0 859.0 858.0 858.0 857.0 857.0 856.0 856.0 856.0 856.0 856.0 856.0 856.0 856.0 856.0 856.0 856.0 856.0 856.0 856.0 855.0 855.0 855.0 855.0 855.0 855.0 854.0 854.0 854.0 854.0 853.0 853.0 853.0 853.0 853.0 853.0 853.0 853.0 853.0 853.0 852.0 852.0 851.0 851.0 850.0 850.0 849.0 849.0 848.0 848.0 847.0 847.0 846.0 846.0 845.0 845.0 845.0 844.0 844.0 844.0 844.0 843.0 843.0 843.0 843.0 843.0 843.0 843.0 844.0 844.0 844.0 845.0 845.0 846.0 846.0 847.0 847.0 848.0 848.0 849.0 849.0 850.0 851.0 851.0 852.0 852.0 853.0 853.0 853.0 854.0 854.0 855.0 856.0 856.0 857.0 857.0 858.0 858.0 859.0 859.0 859.0 860.0 860.0 861.0 861.0 861.0 862.0 862.0 862.0 862.0 862.0 861.0 861.0 860.0 860.0 859.0 858.0 858.0 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