The Domaine du Trou d'Enfer in the Marly Forest is now a preserved forest area that you can discover through thematic tours offered by a host of the National Forestry Office.
birds and their song
the Trou d'Enfer military fort.
- maintenance of the fort
- rally, treasure hunt in the field including the forest, the telegraph, the fort, the swing bridge
- plantation maintenance
- creation of screes to attract small wildlife
Duration between 2:00 and a day
All year round, daily.