It would be nice if users can build ancient ruins in different styles and the best ones could make it into the final game! (a voting in the forum could decide which one gets into the final game)
The users have built many nice stuff , so this could be a nice way to implement great content for the game!
There could be 3 kinds of structures:
1. very small destroyed structures, some are just a view stones, destroyed small parts of megalithic walls, some pillar parts and also piles of huge stones. In some places you can discover some loot or even a entrance to a small cave.
2. abandoned small buildings like ruins at a hill top, old towers and parts of old buildings. Also abandoned lumberjack shacks in the woods where you can find some loot would be nice.
3. bigger structures like old megalithic temples, pyramids in the desert (and jungle) and abandoned small ancient mysterious structures and fortifications made of stone. This kind of buildings and parts of buildings could be also places with good loot and enemies.
Not the size of the structures should matter, the look, details and feel of them should matter.
It would be very welcoming and very nice for the game because I have seen so beautiful buildings and Im sure many users would help with this task!
Here are some examples what could be interesting: