Planning a vacation to Heiligenhaus in Germany? This vacation planner will provide you with all the essential information you need. The nearest major city to Heiligenhaus is Aachen. Add Aachen to your vacation plan, it has an interesting bunch of activities to do on your visit like Aachen Cathedral, Carolus Thermen Bad Aachen, Rathaus Aachen. Get in the character of the city, this city requires at least of 1 to 2 number of days of exploration.