You can catch an event at Piscine 'Natatorium', located 1.7 mi (2.8 km) from central Treviso.
If you think Piscine 'Natatorium' is cool, you also might like Monigo Stadium and Piscine Comunali Fiera e Selvana, both located nearby.
If visiting museums in Treviso are on your list, you might want to check out the upcoming exhibitions at Luigi Bailo Museum. If you want to see more of the museums in Treviso, Musei Civici di Treviso isn't far either.
Il Montello is 0.9 mi (1.5 km) from central Treviso, why not stop by during your stay. It's also full of great cheese shops and restaurants, so you can spend the afternoon having a wander.