Armory

"Inside was not gardening tools, unless you want to make war on your tomato plants."

- Piper

The Armory is a large metal shed around the side of Athena's cabin, and is where campers go to get their weapons. Every camper gets a weapon, but the Hephaestus' cabin makes their own. It has quite a large collection of swords, spears, clubs and even shotguns.

The Lost Hero
In The Lost Hero, Annabeth took Piper to the armory where she helped the latter choose her weapon. There, Piper chose a highly-reflective dagger which would later be named Katoptris.