I visited this WHS in July 2016. Out of the 4 WHS I saw in Sweden this was the least interesting and in my opinion it is more of a pleasant touristy national heritage site without any particular OUV. In the past, the construction and fitting out of a sailing warship was slow and time-consuming. When at their moorings or in the docks, the vessels were extremely vulnerable but with Karlskrona, protected as it was by a natural barrier of islands and well-planned defences, the Navy had an excellent anchorage as well as a secure base for its ships. Although the naval port planning is pretty much intact and everything is well looked after, painted and clean with several naval and maritime museums, I think that having a parking lot in the main square is a huge eyesore especially since just a 2 minute walk away, there is a huge underground parking that is almost always empty! There is no single building which really stands out although I particularly liked the Klockstapeln clocktower (picture). The Fredriks Church and the Trinity Church in a way reminded me of Weimar although the latter has way much more on offer. After enjoying a pleasant harbour cruise mainly to be able to appreciate Kungsholmen Fortress's exterior and fortified islands, I decided to walk the heritage trail to visit most of the inscribed area and the main sites. Just in front of the main boulevard next to the main square there is a UNESCO flag and beneath it is the UNESCO plaque proudly displaying Karlskrona's inscription. After looking up at some of the ornate buildings I headed towards Stumholmen island which is connected with a wooden bridge. Since 1683 this has been the production and provisioning area for the Swedish Navy and an off-limits military base till the 1980s. Now there are several hangers such as the Flyghangar 4, army sheds, bastion walls, iron cannons, marinas, a lighthouse and the Kungshall Fortress just opposite the sea fort of Godnatt. Godnatt is like a miniature roundish version of Fort Boyard in France. Next, I visited the Naval Museum with its submarine hall (notably Neptun and Hajen) and several warships and traditional ships. My favourite part of the museum was the collection of figureheads. While walking the heritage trail, I passed by the off-limits dockyards with their old fortified entrance, the cabinboys' barracks (one of the oldest educational institutions of Karlskrona), the Fiskorget and finally at sunset I followed the locals to Stakholmen island after having bought a takeaway doner kebab. I enjoyed the panoramic view of Karlskrona from here and it was a great way to end my visit before heading to my hotel.