Oh, that's a good question! Navy Pier is a popular tourist attraction in Chicago, and it's open on Christmas Day. It's a great place to take a stroll along the lakefront or check out the shops and restaurants. Some of the attractions, like the Ferris wheel and the carousel, may be closed for the holiday, but there are still plenty of things to do and see. So if you're looking for something to do on Christmas Day, you can definitely check out Navy Pier!