I had the fortune to climb the Eiffel Tower while in Paris. I climbed as far as they allowed you to go at the time, which was the second observation level. The climb from ground level to the first level is over 300 steps, as is the walk from the first to the second level. Needless to say, I was a bit tired when I reached the top. About half way up, I realized that I had my camera backpack still on and should have left it with someone down below!