Minecraft wiki entry for Building_a_metropolis, associated text: National Park Close off an area of your metropolis and leave it how it is, with forests, caves, villages, plains, deserts, taigas, snowy tundras, oceans, rivers, temples, mineshafts, strongholds, dungeons, jungles, etc. Make a "Leave No Trace" rule here (for example, if someone builds something, they have to take it down, once they are done using it, they have to replace blocks they destroy with the same block, they have to use spawn eggs to replace anything they kill, etc.), and if they do not follow it, they will go to Minecraft prison (which is mentioned above). While constructing your national park, make cabins for guests to stay in, with a few bedrooms, a bathroom, a living room, a kitchen, a balcony, etc., and use gravel roads to connect them. If there is a stronghold located within your national park, you can dig down until you get to the stronghold and then add ladders or stairs so people can get there. It is also advised to activate the End Portal. National parks can also be made in The Nether, with the same rules as Overworld national parks.