Yesterday morning was very foggy. I noticed the fog wasn't really that high, as I could see the sky above. So I managed to take this photo with my drone.
Before anyone mentions it's illegal to fly in Den Haag: yes it is , inside of the geo zone. So I positioned myself right outside of it (right in between the 2 no fly zones south east of the city), flew my drone up 120 meters (maximum allowed height) and this is the exact view I got.
Perfect fog levels for the drone do not happen that much in the Netherlands. The clouds are often too high, or the fog is too thick and too high to fly above. Yesterday morning was perfect.