Huis Doorn was the home of the banned German emperor Wilhelm II from 1920 until 1941. Currently, it's a museum where you can learn more about the Netherlands in World War I. Including the luxurious, imperial interior of back then and a romantic rose garden.
Take a trip back in time and experience the seige of Maastricht during a tour of the Kazematten, or casemates. These vaulted chambers beneath the city ramparts can be very cold, so don't forget to take your coat!