Don't miss the holy city of Qom.Btw, you misspelled Tehran.
If I have time to visit just one nuclear site, in the Natanz the best one?
There are some French Jews who have gone in the past to visit kevorim, for example Mordecahai and Esther.
https://www.google.com/amp/s/en.radiofarda.com/amp/no-major-destruction-caused-by-attack-on-holy-jewish-site-in-iran-us-condemns-/30615532.html