The Polar Express train opens for visitors in Union Station, St. Louis, U.S., November 20, 2020. The popular train, in its seventh year, will not move due to the COVID-19 pandemic, but visitors can still go aboard to experience actors in costume, singing and dancing. /CFP

Actors sing and dance for visitors aboard the train. /CFP

The Polar Express used to provide a 45-minute round-trip ride to "the North Pole," but this year it remains stationary for a walk-through event due to the pandemic. Protective measures, such as wearing masks for all guests over the age of 9, are required. /CFP

The Polar Express train ride, set to the soundtrack of the 2004 movie, has been an activity for the Christmas season since 2014 at St. Louis Union Station, which plays host to a variety of attractions, and families are welcomed to wear their holiday pajamas for the experience. /CFP