/b/ is where the internet goes to die. Its a place where both God and Satan vow to stay away from. /b/ is where every internet meme ever ends up. /b/ is rule 34. /b/ in is my mind forever. You cant undo /b/, but you can undo your search history.
If /b/ where a city, it would be Manhattan. Beacuse its the only place newfags know about, and all the trash winds up there. But....
Either the place to live your most morbid, surreal, and outrageous fantasies, or a place to lose all faith in the continuity of mankind itself. A place were if it exits there is porn, hentai, yaoi, yuri, and all other forms of sexual entertainment of it. Where the laws of physics fall apart.