Look for 'em in Interclan Conflict. There should be a sticky.
Basically, keep everything here limited to the places hollows usually hang out.
If ya wanna travel between worlds, please use your preferred web browser to travel to the appropriate sub-forum. All hollows should be able to travel between worlds freely, some just safer than others, like arrancar which can use garganta to get around, unlike low-level hollows who might get ambushed by shinigami or just plain killed in the crossing over by things like 'the cleaner'

Shinigami sometimes use the tunnel world too...

Oh and feel free to make your own roleplay threads as your little hearts desire. So if you wanna do you're own little version of las noches or the menos forest or other popular resort locations...again feel free.