The trains and their history, were amazing! However, as the parent of two young ones, I was in need of a bathroom almost immediately. It was a little difficult to find (behind the exhibition gallery) and wasn't really easily accessible swiftly.
That being said, the more important thing is how awesome all these trains were, and being able to walk in the round carriage house took my breath away. It's a stunning collection of trains, real and model that show the complete development and use of trains, starting from their European designers to their modern equivalents.
It's a terrific place for fans of trains, or those who want to see something a little different. The 1-mile train ride is best for little kids - there's no point for adults to try and listen to the droning voice-over and there's not a whole lot to see out the old and mangled plastic MARC train windows.
If you're into it, you could spend a few hours here. My kids enjoyed the train-themed play area the best (Dress up as a conductor? Awesome) but we maybe spent an hour and half here. Our train buff friends spent 3+ hours.
It's neat, easy to visit (walked to it from downtown), and the guides are all friendly. I'd say try it at least once if you're in Baltimore and you've never been.
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