Sometimes, when you are in one structure and you type /locate <structure>, game will send you message with coordinates of other structure.

But if you will move in structure for some blocks, game can change its message and will show you  coordinates of structure, you are in.

Full video of this moment: https://www.twitch.tv/moddychat/clip/SmoggyDifficultMelonUncleNox?filter=clips&range=30d&sort=time