Purchase a ticket to watch a game at Estadio Cidade de Coimbra. If there's nothing on while you're in the area, you might like to check if they offer a guided tour of the grounds.
This sporting facility is located in Coimbra, a place that has lots going for it! Portugal dos Pequenitos, Old Cathedral of Coimbra, and Santa Cruz Church are other worthwhile sightseeing options not far away when you've finished up at Estadio Cidade de Coimbra.