Discovering the Secrets of the BRB Ruins

I present the main character, who, traveling around the world, moves forward without paying attention to the dangers that may lurk for him along the way, comes across the ruins of a probably old fortress, the foundations of which are formed by the letters BRB, without thinking long, decides to travel through this corner of the world to discover the great secret of BRB, which perhaps no one has discovered yet, and in this way give someone hints for the future ;)