With the TAGTHAI Day Pass, you are allowed entry to most tourist attractions for free where Bangkok is also listed with the bonus of enjoying massages, transportation options and even food and beverage choices at selected restaurants and cafes. Here's Avantika's 24-hour itinerary, go around Bangkok and maximize the TAGTHAI Pass.
https://waywardwayfarer.com/24-hours-in-bangkok-itinerary/
