Loads of old empires left behind mighty structures that hold stories. Some of those stories are painted on the walls, like we see in Egypt, some tell the stories by the scarred walls, and some structures have their stories told by those who still live around them.
Sometimes empires are rekindled and rebirthed in the same buildings, sometimes those buildings are completely leveled by newer empires that arise.
Your prompt is to tell the tale of an explorer, adventurer, or anyone else who goes in to check out an old building that was built by some empire that has since perished.
Maybe your character is preparing to destroy the structure. Maybe they’re trying to find an ancient secret weapon. Maybe they’re on the hunt for clues to a lost treasure.
There are so many things that you can do with this prompt! I hope it inspires, and you’re free to use it however you please.