The town walls of Hulst.  Hulst is known as a fortified town; it is one of the few places in the Low Countries that still has its town walls virtually intact.  They are not only nice to see from an strategic and architectural point-of-view but they are also very pleasant for a walk.  The historic center of the town is situated completely inside these walls that still completely encircle it.  These fortifications are the largest monument of Hulst and in their present state, they still largely date back to the  80 Years War [more info].

The basilica of Saint-Willibrordus.  Construction of this gothic church started in 1200 but it would take untill 1534 for it to be completed, at the dawn of the religious troubles and iconoclastic fury.  Once the catholic Spaniards were driven out of Hulst in 1645 (80 Years War), the church passed on to the protestants.  This situation remained until the French occupation under Napoleon (1806) when the church was split in two parts: one half for the protestants, the other for the catholics [more info]

The Refuges of Hulst.  A refuge is, as the word implies, a house that was built by religious orders where they could take shelter in case of emergency.  These refuges were constructed in fortified towns.  When there was danger, monks could leave their farmsteads on the countryside behind to these safe places, safely behind the walls of the town.  There were also refuges in Hulst.  Three of those houses are still there: Baudeloo, Cambron and Ter Duinen.  They are some of the most beautiful edifices in the town [more info]