On the plateau of Coucy, in spur above the passage from the valley of the Ailette to the valley of the Oise, stand the remains of what was the largest fortress in Europe. This small circuit that follows the layout of the ramparts offers an uninterrupted succession of views of the surrounding countryside and forest.
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<p><a class="routeYou_embed" href="https://app.routeyou.com/en-fr/route/view/302565?utm_source=embed&utm_medium=article&utm_campaign=routeshare&navigation=external" title="In the shadow of the ramparts - RouteYou" target="_blank"><img src="https://image.routeyou.com/embed/route/960x670/302565-en@2x.png" style="width: 100%; height: auto;" alt="In the shadow of the ramparts"></a></p>
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