The extraordinary Red Sands Maunsell Forts in the Thames Estuary have been on my list to visit for some years. These were designed by the civil engineer Guy Maunsell and built during WW2 to help protect London from air raids against enemy aircraft flying up the Thames estuary. On a clear day these are visible from the north Kent coast, and just under an hour away by motor launch. For a little more information try https://weaponsandwarfare.com/2020/06/16/maunsell-sea-forts/
Very fortunate with the weather, not so many challenges from a photography perspective. My favourite travel lens the 12-100mm Zuiko performed exactly as expected. Not so much need for the image stabilisation due to light levels though welcome to manage the boats pitching in the shots from a distance. A polarising filter was used on all shots.