1. Costello Park (or similar) could be what you’re referring to in a specific location.

2. Mundson Park: This could be a variation of another park’s name, or it might refer to a location near Mundoolun or Mundaring, but I’m not sure about the direct connection.

Can you verify the correct name of the park or provide additional details (location, suburb, etc.)? That will help me direct you to the right contact information!