The sewer in "Stardew Valley" is a very special area in the game, but many players don't know how to enter the sewer. In fact, if you want to enter the sewer, you can donate 60 items to the museum, and then you can get it Go to the sewer key and enter the sewer.
How to enter the sewers in Stardew Valley
Donate a total of 60 items to the museum, and you can get the sewer key to enter the sewer.
After completing the construction of the community center, go to the railway area and you will receive a mission from the mage to find the dark amulet. You can then go deep into the sewers to reach the swamp and the witch's residence.