The Eiffel tower is not just a large metal structure: its two and a half million rivets hold up three floors of shops and restaurants. The lifts go up this far, but it is worth climbing the steps to the top. The French pronounce 'Eiffel' as /eff-ell/, and not /eif-fl/ as we do.

An interesting feature is that the pressure exerted on each of the four legs is very low, owing to the unusual design: it is about the same as the pressure your posterior puts on your chair.