Plus, after about 230 stairs, you get a little break, and you can look at this cool interacive display.
Ghostly lights of traffic circulating around the 12-lane roundabout that surrounds the Arc de Triomphe. Not the best picture, technically speaking, but I really like it because A) for once, I managed to get a reasonable straight horizon line, and B) it's mostly symmetrical.
So, there you have it. 284 stairs, a few pics, 12 lanes of traffic, and 2 tired sisters.