This set of map cards is a perfect example of some of my favorite complaints about so many of these Map Packs: these are flat, wide-open set-piece areas with no walls or obstacles to use for combat cover or ambushes, or to provide interesting areas for exploration, and little opportunity to link things together into a "dungeon" complex full of tunnels, rooms, and chambers.
I knew what I was getting before ordering a pack, thanks to the wonderful preview images on this site, but I didn't examine the images closely enough to notice the problems before ordering. I think I had images of claustrophobic Diablo-style hellish dungeon areas and landscapes when I ordered.
The art is, as usual, quite stunning; A+ for that.
The bridge and river should be useful to add to cavern areas, at least. It's dark enough to pass for a bottomless chasm, if needed, adding some versatility.
The flat, open spaces could work for large cavern spaces or even alien landscapes, though I think they badly need a few cavern and building walls and terrain features such as ledges and pits; this is one instance where I definitely wish the Map Packs could take dry-erase markers the way Flip Mats can, to add in architecture and other features as needed.
I might find a way to put the "hell gate" to use in horror-themed games for cultists to summon some eldritch horror through. The ice and fire pits could make some interesting set pieces, though I think I would have preferred to have seen them set in some cavernous grottoes with walls and rock formations so that they could be get double use in natural settings.
The road is something I wouldn't find much use for, sadly; I might have been happier seeing a couple of bends for the river, instead. This would be the only tile I would set aside to the "bits bin" to gather dust in this set. With some modification and imagination, I think the rest can be combined with dungeon, sewer, and cavern settings to build an Underdark or Diablo-flavored hellscape full of subterranean ruins and other creepy features to explore.