The Heap is the stench zone in Hobopolis . During combat, stench damage is taken over time.
Combat Adventures
Non-combat Adventures
You vs. The Volcano
Kick the stuff into the hole : Start eruption, increase stench in area, kills some hobos
On second thought, that's probably a horrible idea : Skip adventure
I Refuse!
Explore the junkpile : Drops three items, which seem to be randomly chosen from a subset of all the items in-game. Seems to reset the stench level to the minimum.
Climb back out : Nothing. (No Adventure loss.)
Deep Enough to Dive
Wig out, climb in, throw down : Fight Oscus
Do like the sign says : Nothing. (No Adventure loss.)
Note: This adventure only occurs when The Heap is clear of hobos.