Chateau de Voltaire: Guided tours of the Chateau where Voltaire spent the last 20 years of his life. Opens from May through to September (closed Mondays). Located at allee du Chateau, Ferney Voltaire (01).
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Tel: 04 50 40 53 21 Fax: 04 50 28 04 84

Chateau des Allymes: Military fortress dating back to the 14th century with dungeons. In good condition thanks to various restoration projects. Seasonal opening hours. At Breydevent, Amberieu-en-Bugey (01).
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Tel: 04 74 38 06 07 

Fort l'Ecluse: Two forts connected by an underground staircase of more than 1000 steps cut into the rock. Opens to the public from June to September. Located at Longeray, Leaz (01).
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Send an e-mail Tel: 04 50 56 73 63 Fax: 04 50 56 73 18

Historical Tour of Gex: Guided tours (some in English) run July to September and take you round the buildings of Gex. Information from the Tourist Office in Gex (01),
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Tel: 04 50 41 53 85 

Les Marmites de Geant: Open all year round. Parking on the outskirts of St Germain. Follow the signs and walk to see potholes, waterfalls and gorges. Free entry. At Bellegarde-sur-Valserine (01).
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Tel: 04 50 48 48 68 

Parc Naturel Regional du Haut Jura: Regional park with lots of walks and excursions. The park site has an English translation or contact a local Tourist office - 24, Place Victor Bérard Bellegarde (01).
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Tel: 04 50 48 48 68 Fax: 04 50 48 65 08