Embark on a Hop on Hop off Nature and Castle tour, for a full day to discover the history of Luxembourg, from the Middle Ages to the modern age, aboard a modern convertible bus. See Mullerthal, admire the Castle of Vianden, and visit the oldest city in Luxembourg, Echternach. Stops along the bus route: 1. Mullerthal - Schiessentümpel:  The waterfall, known as "Schiessentümpel", with its three water jets on the Black Ernz is one of the most photographed sites in the Mullerthal Region. Begin a 45-minute walking tour. Please make sure to wear good and comfortable shoes. 2. Castle of Beaufort:  The medieval castle of Beaufort was built in four different periods, between the 11th and 17th centuries. You will have 45 minutes to visit the castle or explore the area on your own. 3. Castle of Vianden:  The small medieval town of Vianden and its imposing castle attracts thousands of visitors every year. Try local cuisine at one of the charming restaurants, discover the town’s fortified towers, visit the Castle of Vianden, or take a ride on the chairlift during your 2 hours of free time. 4. Echternach:  The city of Echternach was founded in 698 by the Benedictine monk Willibrord and is the oldest town in Luxembourg. Visit the most beautiful places and buildings of Echternach, like the Basilica, the abbey and the market square during a 45-minute city tour. After visiting Echternach, you will return to the original departure point in Luxembourg City (Boulevard de la Pétrusse).