Purchase a ticket and join the crowds at a game at Regional Stadium of Chinquihue. If there's nothing on while you're in the area, you might like to check if there's a guided tour of the facilities.
This sporting facility is one of the top sights in Puerto Montt. But it's not the only spot in the area worth visiting. After you've paid the entry fee and fully explored Regional Stadium of Chinquihue, take a look at nearby Angelmo Fish Market, Mall Paseo Costanera and Puerto Montt Cathedral as well.