As noted in AllStarGamer’s video in YouTube, this area in the PS1 Batman And Robin game remains a mystery. It’s on the game map as a distinct destination, but nothing seems to happen there.
There’s a statue of a woman pointing her sword at a building. Go up to said building and the camera angle changes, as if you can enter the place. But you can’t get in. Some clues point to a suspicious vehicle being parked here on the third day, which indicates that Mr Freeze may show up at some point. Another clue shows a newspaper headline, stating that a band parade is happening there.
The only other notable thing in the square is a billboard. You can take a photo of it, and it’ll provide a clue about a diamond at the city museum (which is a part of the first and third day missions).
Was this an abandoned or undeveloped idea? Or has it yet to be unlocked? Even after twenty years, the game has not given up all of its secrets yet.