I am submitting this for the contest.

What the heck is the lost city??:

Well based in my mind. I have found to realize that there isn't many ruins compared to the strongholds. So why not add another? Well sure! I made an idea on what I should think of. This city is the best answer. For all of those people thinking, oh that is a terrible Idea, I respect your opinions. Let me explain what you need to know about this place.

First off, it will be underground, like most of the things, but the important part is that There is only one. The reason why is simple. Because if there were underground cities all over the place, then what is the fun of that? Also it would take up a lot of space when you are exploring.

How would I get to it?

I was thinking, I have come up with a solution. On rare a cations. Where you are trading with a villager, you will be offered a map in which it shows part of the map and cords where the city is, the other pieces can be found in chest in underground mineshaft. Or you can randomly walk into it when digging, but remember, there is only one in the entire world. So it would be extremely rare. It will not be craftable. So it will be even more difficult to find.

What would be in it?

Well it would be a hollowed area filled with houses and shops, farms, playgrounds, and many more things. The city would be quite large. Able to hold up to 50 minecraft players living there. You will find no people, for which it has been abandoned, but there are items and goodies that you can find! Also a unique sword and armor in the kings chest located in the castle.

Well, that is my Idea! Thank you all for reading! More updates soon!

Picture link is here if you are wondering. ponponxu.deviantart.com/art/Underground-City-163759046