By editing the 'larger greenhouse' option in the \ Grandpa's Farm\config.json file from 'false' to 'true' you can access a larger interior. The interior defaults to the game's original version. The player will need a copper axe to reach it. The greenhouse is now located in the western part of the farm and has a stone bridge which leads to it. Much like the Forest Farm map, the western side of this farm (across the small stone bridge) can spawn forageables. It is located in the upper middle of the map, next to the staircase which leads north.
The cave where Demetrius sets up his experiment.
