On Christmas Day, many businesses and attractions in Houston are closed as it is a federal holiday. However, there are still a few places that remain open, such as gas stations, convenience stores, and some restaurants that offer take-out or delivery services. Additionally, some attractions may have limited hours or be open for special events, so it's best to check their websites or call ahead to confirm their hours. Some places that are open on Christmas Day include Walmart, Target, and some grocery stores like H-E-B.