With this view we can see perfectly the citadel, bordered and surrounded by fortifications and ditches, fed by canals dug by the hand of man, themselves fed by the Hue River or Perfume River.

The citadel is surrounded by a wide moat that roughly delimits a square over a perimeter of more than 10 km as well as walls 6 m high.

The width of the walls reaches 20 m in places. The citadel is accessible through ten fortified gates, each with a bridge.

Here we admire its watchtowers, its ditches and the colonial infirmary that has taken place in one of the watchtowers.

Let us now enter the citadel