I wish I had taken a picture, but last night my wife and I encountered a very odd map when doing a Delve.
The map used mostly Nerekhall tiles, and separated one hero from the group during setup. The separated hero was placed in a medium sized room with a locked door, with a platform in the bottom corner surrounded by elevation lines. From the platform there was a hallway with several long pits, ending in a portcullis, which contained the switch to open the locked door. On the other side of the portcullis, there was another hallway that linked back to the tile with a long elevation line and the stairs, which were blocked by another portcullis. The remaining heroes spawned on the other side of that portcullis, along with the portal.
Now, as far as I can tell, there was no way for the heroes to raise the portcullis, no way for the separated hero to reach the switch to open the door, and no path the other heroes could use to reach the switch. Fortunately (or maybe by design) we had Astarra as an Illusionist, so she could create illusions on the far side of the portcullis, then use her hero ability to move adjacent to it. But if we had had any other hero, it seems this map would have been impossible.
Has anyone else encountered this? Or was this map chosen specifically due to our hero choices?