From the Super Mario Wiki
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Miracle Space (also known as Chance Time Space) are among the rarest type of spaces in the Mario Party series. There are generally only one to three of them on each game board. They are called ! Spaces in the first Mario Party game, and players who land on it must play Chance Time. Also, in boards where the Star moves after a player purchases one, the ! Space often takes the spot where the Star has been. In Mario Party 4, they are called Fortune Spaces, and players landing on it played Reversal of Fortune, nearly identical to Chance Time. In Mario Party 5, these spaces are Chance Spaces, and they appear only if players place Chance Capsules on a Blue or Red Space. Anyone lands there must play the Round of Miracles, an event again nearly identical to Chance Time.
In Mario Party 6, they are referred to as Miracle Spaces. All names and renames of both the space and the event are essentially the same, differing in name only.
Names in other languages