If you look closely, you can still find parts of the State-Spanish Lines in the landscape. The State-Spanish Lines are the remains of military defenses from the period of the Eighty Years' War (1568 - 1648) to the French Period (1794). These lines can be found on both sides of the border between the Netherlands and Belgium and played an important role in defining the border. Go out and discover the hidden history!
More information can be found here.