Marigold Station is a metro station in Fallout 3, located in the town of Grayditch. The station is filled with deadly Fire Ants, due to Doctor Leskos experiments. The furthest south of the metro is the Queen Ant's Hatchery, home of the Fire Ant Queen.
 Grady's Package
Main Article: Grady's Package
The corpse of the man Grady can be found here, near the escalators. His note Grady's Last Recording can be found not far from the body, the holotape tells you the location of a safe with Naughty Nightwear and the key. A hostile NPC named Lug-Nut will approach the player if he/she takes it.
Main Article: Those!
In the quest Those! Bryan Wilks begs the player to find his father Fred Wilks. After he/she finds him dead the player has to go down to this station and fix the fire ant problem by approaching the Fire Ant Queen.