Tonight while walking home I saw the Eiffel Tower partially shrouded in fog, which isn't unusual. For some reason it looked like a giant alien spaceship looming over the city from where I was, which is a bit unusual. My imagination must have been especially sharp tonight.
When the weather is like this, it's useless to go to the summit of the tower. All you see is mist, and it's cold and damp. The searchlights at the top of the tower managed to pierce the mist a bit, but most of the time the summit itself was completely hidden. Once in a while it would briefly peek out of the mist.
My aviation-oriented brain notes that this would be a full overcast at 1000 feet AGL.
If you know Paris really well, you'll be able to figure where I was when I took the picture.