Pirate Treasure Hunt: Trash Edition

Arrrgh. There be treasure in Denver. Though landlubbers might just call it garbage.
We're meeting downtown during Denver Oktoberfest for a pirate treasure hunt. We'll split into pirate crews of two or three, give each crew a treasure-hunting list, trash grabbers and a bag, and send everyone out in search of booty. We'll be hunting for things that others might be calling trash, but we'll know what they really are:
a cursed artifact, remains of the Kraken, a goblin's lunch, lots more booty.

Some treasures will be actual litter that we collect. Others will be things you have to spot and photograph. We'll have about an hour to hunt, then meet back up, compare our booty, and award plastic gems and doubloons to the crew that has accumulated the greatest trash treasure.
Because we're doing this during Denver Oktoberfest, there will be plenty of grog and music afterwards if anyone is interested.

Pirate apparel encouraged if you have it!