The Heap is the stench zone in Hobopolis. During combat, stench damage is taken over time.
A primary stat of 350 is suggested. If your main stat isn't high enough, you'll see the following message:
The buzzing of flies assaults your ears as you near the Heap, but the ear trauma is nothing compared to the flat-out war the Heap is waging on your nasal cavities. You're not sure you can fight here and keep your lunch down.
(It is recommended that you have at least 350 <mainstat> to adventure here.)
Be green: Move compost to The Ancient Hobo Burial Ground (reduces ambient spooky there by letting flowers grow). Also lowers the ambient stench in this area.
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.)
Note: Only available when stench in the area is at least level 8, plus more for however many people are currently sitting simultaneously in this choice adventure.
Note: Occurs when somebody else is already fighting Oscus.
Notes
49-51 hobo kills are needed to advance each image file, depending on the total number of hobos in the zone.
Oscus will only appear when the location's image is on its 10th variation. After defeating Oscus this area can no longer be explored.
Attempting to adventure here after Oscus has been defeated yields the message:
The Heap is empty. Well, let me rephrase that. It's still full of garbage, but there's nobody and nothing of interest mixed in with the garbage.
Several people can sit in the junkpile choice adventure at once, but it seems to require a higher ambient stench level (i.e. set off more trashcanos) for each successive person to actually find it. Actually diving into the junkpile resets the ambient stench, but all the people currently simultaneously in the choice adventure can still dive even though ambient stench is now 0 (so long as they actually found the adventure while the stench level was still high), allowing for cooperative simultaneous diving.