" tourists take photo from those bridges, " Of those bridges, not from them. I think lovers could do this, because it is something unusual that happens in a particular time of the day, and it happens in night. I think, if a boy and and girl who like each other go out to look at somethign unusual in the night, chances are someone will kiss someone.

No connection. Just two different facts about bridges

so, tourists take photo from those bridges, and lovers declare their loves there? what is the connection? // Well...They don't take photos from the bridges, they take photos how the bridges are open (lifted) at night. It's a beautiful night view, and people get into romantic mood which evokes positive emotions: tourists start taking pics, lovers declare their love to each other.

Это два разных факта... Перечисление событий, которые там происходят

Романтичным симВолом города