Maastricht-Aachen is the most southerly city in the Netherlands, and many claim one of the oldest. Car rental affords the ideal way to really discover sights such as the huge church of St. Servaas and St. Jan's Cathedral in Vrijthof, one of the two town squares. Or rent a car to visit St. Pietersberg Caves where over 20,000 tunnels and passages were used as shelter in bombing raids and sieges. Maastricht-Aachen is within minutes of both Belgium and Germany, and car rental from Sixt is the perfect way to see a little of both.