Welcome to alchemist manor, a fully stocked house that features almost every supply you will ever need, including special blocks like command blocks, structure blocks, monster spawners, spawn eggs, etc., an infinite water source, and a fireplace that is turned off and on with a button. Credit for the design of the fireplace goes to MrCrayfish.

NOTES:

To use: navigate to minecraft/saves. Go into the folder for the world you plan to use. Create a folder called "structures" (unless it already exists) and place "alchemist manor.nbt" in that folder. Then start the game. To place the building, dig down 3 blocks (so the building will be at ground level) and place a structure block at the bottom of the hole. Set the block to "load" and type "alchemist manor" into the title field. Click load, activate the block again, click load again.

Infinite water source is on the left of the fireplace.