The Jura-Trois-Lacs has published a small brochure you can download. 
Ten excusions developed by Joëlle Chautems, who wrote a few books about
nature's energy.


Ten walking trails throughout the destination enable hikers to discover often little known, energy-filled locations.

These walks are intended for all those who are interested in natural energy, who wish to have some time for themselves
and relax while discovering nature, its benefits and possibilities.

The routes:

Canton of Jura: The Mysteries of Etang de la Gruère and The Wyvern of St-Ursanne
Bernese Jura: The Witch’s Bath in La Neuveville
Neuchâtel: The Vortex of Creux du Van and The Enchanted Forest of Devens
Doubs Park: The Roches-de-Moron
Solothurn: The Verena Gorge
Bienne Seeland: The Rocks of the Jolimont Druids and The Sacred Temples of Jaïssberg
Murten: The Rolling Stone of Mont-Vully

The brochure is french/german and has some interesting pieces of information about the nature's energy of the places, 
which make all the interest of these walks. 

But there's also a map so if you just go for a walk, it's fine.

http://www.juradreiseenland.ch/en/leisure-activities/hiking/revitalising-walks.7497.html