Doue-la-Fontaine is also the site of the oldest habitable "donjon" (the main tower within the walls of a medieval castle or fortress) in France, dating back to the year 900. Nearby are the troglodyte and mushroom caves. Four kilometers from the town, the Zoo of Doue La Fontaine is partly built within the network of the troglodytes sites and dwellings. Recently, a cave containing sarcophaguses was unearthed.
For an exterior site in English, giving a history of the village and a collection of photos including a Carolingian residence and an ancient stone coliseum see: http://perso.wanadoo.fr/dlf49/text_htm/menu.htmlExternal link