Edinburgh's main train hub, Waverley Station, is downtown, below Waverley Bridge and around the corner from the unmistakable spire of the Scott Monument. Travel time from Edinburgh to London by train is as little as 4½ hours for the fastest service.
Edinburgh's other main station is Haymarket, about four minutes (by rail) west of Waverley. Most Glasgow and other western and northern services stop here. Haymarket can be more convenient if you're staying in hotels beyond the west end of Princes Street.
First ScotRail (0845/601-5929. www.firstgroup.com/scotrail). National Rail Enquiries (08457/495051. www.nationalrail.co.uk).