Maastricht is known for its picturesque squares, romantic streets, and historical buildings. City Fortifications, including: Helpoort - a 13th century town gate, the oldest in the Netherlands. Fragments of the first and second medieval city walls.
Hoge Fronten (or Linie van Du Moulin) - remnants of 17th and 18th century fortifications with a number of well-preserved bastions and an early 19th century fortress Fort Willem.