query: Is Gona Barracks still and active military barracks?
passage: Gona Barracks
In October 1998, following a period of scaling down of activity at the site, Gona Barracks officially closed. Units based at the barracks were dispersed to other Army bases, the museum shifted to Enoggera and a war memorial flagpole sent out to the Royal Australian Regiment Memorial Walk and Contemplation Building at Enoggera.[1]
passage: Fortifications of Gibraltar
Some of the 18th and 20th century tunnels can also be visited. The Upper Galleries (now known as the Great Siege Tunnels) on the North Face of the Rock of Gibraltar are a popular tourist attraction within the Nature Reserve. A number of tableaux have been installed to recreate the appearance of the original 18th century gun batteries housed within the tunnels. They include a number of Victorian 64-pounder cannon on original Gibraltar gun carriages. The Middle Galleries, where World War II tunnelling joins the original 18th century tunnels, are open under the name of the "World War II Tunnels". The Lower Galleries are not open to visitors, as they are in a poor condition due to vandalism and neglect, but still contain many relics of their former military usage.
Many of the fortifications at sea level have survived, though not always in their original condition. A substantial number have been built over. The Inundation was drained after World War II and is now the site of the Laguna Estate, named after the Inundation's lagoon. The glacis was likewise used as the foundations of the Glacis Estate. The flat ground of the retired batteries made them prime building spots during Gibraltar's post-war building boom, thus many of them have disappeared under recent developments. The city walls have almost entirely survived and are progressively being cleared of modern structures to restore them to something more like their original appearance. However, they are no longer at the water's edge due to extensive land reclamation. Various parts of the fortifications have been converted to civilian use. After being used for some years as a hostel for Moroccan migrant workers, the Grand Casemates Barracks have been renovated and converted into restaurants and shops. An electricity generating station was built inside the King's Bastion in the 1960s but has since been demolished and the bastion has been converted into a leisure centre.