Bord'wan is a town where they found golems. They met Crowley there. It's one of the main events of the video game, as well as taking up a few episodes in the anime. I don't know if it was in the manga because I have only read a few manga.

But I looked at the canon map and it's not there, so forget what I said. I don't think they ever specify where it is when they talk about it, so I couldn't expect you to know!