Tidal Forest/Water Hazard
The Jesk family inn.
The Ogre charged at the small goblin and ran out after it only to find the dried crust cracking under it’s feet, plunging it into the ooze. It roared with rage, but the more it tried to escape, the deeper it sank. "Welcome to my homeland," said the gopblin with an grin on it’s face. "You were a fool to chase me in here, and now I’ve got you right where I want you…"
"After being to the Bramblefens, blackberry thorns just seem kinda cute!"
A slightly atypical stinking swamp festering with goblins
The Sorcery Springs Geyser Basin is a place of bubbling magical water, as every individual spring or pool has it’s own magical power. It is a place of great wonder and for the careless, great danger too.
The Swollen Shadow’s magic is such, that anyone transported to its demi-plane, will always first arrive in the somber and hazy Umbral Fens, which surround the City of Shadow. After some searching one may find the Brittle Road, which leads through the shadow-choked swamps, to the City proper.
A wasteland, a vast expanse of ogre infested, nightshade choked swamp…
After the PCs defeat (or force the rapid retreat of) a villanous necromancer/demon summoner, they discover a book. This book outlines how to summon a demon whose power increases according to the size of the summoning circle used to summon it. And after the PCs examine a map of the country, they find that the layout of the cities and roads match up with the required summoning circle. In fact, the final road that would complete the circle is currently in construction.
With anyone who can find out about the circle and the ritual to summon the demon able to somehow make the final road/line, and destruction of the cities and roads currently in existence out of the question (unless this is an evil campaign- that removes the moral quandary), how are the PCs going to solve this problem?