I arrived from El Paso on the Amtrak superliner "The Sunset Limited". This was an overnight journey.
The train arrived around 5am at San Antonios Sunset Station - the foyer is about the size of a classroom. I was welcomed with fresh coffee. The only thing is that because the station is so small, so few pasengers get off and the time in the morning - I found tha by the time I finished my coffee all of the taxis had left. The staff there are very helpful and will call one for you.