That looks interesting, I make a search check for loot.
Wait... what comes at me?
Also known as the Circle of Soul Stealing, a devious and powerful trap
Money=zombies. Who knew that the room with pictures of people getting killed would spawn undead things trying to kill you?
The door that cannot be reached, the wall that cannot be climbed
What do you do when you're endlessly falling?
Now you're DMing with Portals!
It sure looks like a normal doorknob...Wait a second...Did it just move?!
Consider your grip and consider just how important the iron spikes and 10 foot pole are.
As the PCs travel the road, right after a bend they hear a sharp whistle and call: "Heeey, not so lazy, move your asses!" It is a large man that calls, and there are unwilling workers that listen. A small company, 10-15 men work on the road, push boulders aside, dig up roots from under the road, etc. The large man that shouted turns to you, smiles fast and mutters something under his breath, sounds like cursing some lazy worker. "Where does the road bring you from, travellers?" And does a little small-talk.
And what is really happening? A group of bandits is 'adapting' the road for shady purposes. The road will not be wider, but tighter, with enough cover around (and a few traps perhaps), and will become an ideal spot for ambushing travellers or entire caravans. The bandit leader wants them all to appear harmless. The 'lazy worker' he cursed was actually a guard that should give warning before any travellers come around (fallen asleep). Not surprisingly, the boss may decide for an ambush even now.