If you're interested in big trains, there's a decommissioned one in Philadelphia at the Franklin Institute: https://www.fi.edu/exhibit/train-factory https://www

If you're interested in big trains, there's a decommissioned one in Philadelphia at the Franklin Institute: https://www.fi.edu/exhibit/train-factory https://www.fi.edu/exhibit/train-factory It's pretty cool to walk in and around it.