艾菲尔铁塔 is the Taiwan / Hong Kong rendering. Mainland China uses
埃菲尔铁塔 (Āifēi'ěr Tiětǎ) — same characters except
艾 ài →
埃 āi. Both transliterate the engineer Gustave Eiffel;
铁塔 means 'iron tower'. Built for the 1889 Paris World's Fair, it was originally meant to be temporary.