The parade ground is the central courtyard of the fortress. The square is surrounded by several buildings, including the main tower, and offers great views of the fortress and the surrounding archipelago. The square is also a popular venue for concerts and festivals. From here, a sightseeing tour goes to the southwestern battery - a fortification located on the southern tip of the fortress. It was built at the end of the 19th century and was equipped with heavy artillery to protect the entrance to Vaxholm harbor. Battery is a well-preserved example of military architecture from the late 19th century. Four 57-mm cannons of the 1889 model form the salute battery of the fortress. The salute battery was used until 2006. The national salute and the royal salute contains 21 volleys. It shakes the air on the occasion of the birth of heirs to the throne, on the occasion of the death of a monarch, and on the accession of a new monarch to the throne. Only in the case of accession to the throne, the salute includes two rounds of volleys. Salute gun weight: 340 kg (950 kg including carriage and shield) Firing range: 3500 m Construction: Stockholm arms factory.

Also in the bastion is a 23-cm bomb cannon of the 1854 model "Wahrendorffare". This was the first breech-loading cannon. Her tests took place here, in the fortress, in 1842. In the mid-1800s, breech-loading guns were introduced into service. They replaced muzzle-loading guns everywhere. The idea itself was not new, but previously used systems were ineffective. Reverse (breech-loading) loading has several advantages. The projectile can accurately enter the barrel and seal it, resulting in better shooting accuracy and increased firepower. Artillery crews work faster, because it becomes easier to load and unload a gun, especially when it comes to a gun turret in a tight bastion. The gun was built at the Akera gun factory. It has a smooth barrel and rear loading. Gun weight: 4080 kg. Firing range: 1200 meters.