[To end up somewhere directly after his conversation with Crowley is extremely suspicious, and the overwhelming darkness is the thing Castiel notices first. He can tell he's still on Earth, but it's not a part of it that he's ever been made aware of. Which seems... impossible, really, since a quick search of the area shows him hordes of undead and all manner of creatures that should not exist.
Not just creatures, but powerful beings hiding in human form, much like him and yet not at all the same. This entire place is baffling, like a void that he's been shoved into. He would almost say that this is a place Gabriel would be likely to send him just to get him out of the way, but Gabriel is...
No, with the unfamiliar creatures here, this is more likely a creation of Eve's. Was this some sort of failsafe, then, set up to drag him in if she was killed? And how could she have the power to hold him here?
Either way, it seems that he's not the only one. Castiel spots the Impala on his third fly-around and immediately lands, finding a structure next to it which he can immediately tell is warded. Seeing how both Dean and Sam had behaved idiotically during their last encounter, it's possible they're trying to avoid him.
It's not that simple. More than that, he needs to speak with them about this situation. Castiel walks up to the door and starts banging on it. The lights inside, if any are on, might be flickering as a result.]