This is very touristy but here goes - we went to the Tour Eiffel. I have been there before so decided to stay down and people-watch (which was very fun by the way). Lili and Dante lined up and went all the way to the staggering 275 some meters of the top floor. (The tip of the structure reaches way over 300 meters.) How anybody thought about building such a thing in 1887 is an interesting question.
Here are a couple of pictures from the top. When I asked Lili how the top was, she said: It was a bit freaky.