Fodor's Expert Review Fond-de-Gras

This small valley lies around 10 km (6 miles) northwest of Esch-sur-Alzette, and was once the heart of the country's mining industry, connected via a pair of railway lines: one to ship equipment and ore in and out of nearby Pétange; another to transport the workers to the mining village of Lasauvage or into France. It was still operating by the 1960s. In summer, visitors can ride trains into the old mining tunnels, pedal a "draisine" (€10) along the tracks, see rail and mining museums, and tour the old villages where the miners once lived. July also sees the arrival of blues and steampunk festivals.