Purchase a ticket and join the crowds at a game at XL Center. If there's nothing happening while you're in town, you might like to check if they offer a tour of the grounds.
This sporting facility in Downtown Hartford is popular with many travelers, so make sure it features on your to-do list. Don't stop there, though. There are many more options ready for you to enjoy after XL Center. Trinity College, Mark Twain House & Museum, and Bushnell Park are not far away.