Seeing all the other places I've been to on my travels, I noticed there wasn't a SideTracked for Haymarket Train Station, so thought I'd rectify this with this cache (please note it's NOT at the station and is about a 5 minute walk from the station due to another cache blocking the area).
A bit of history:
This station first opened in 1842, which was the original terminus for the Edinburgh and Glasgow Railway, before extending the line to go through Haymarket's tunnel to go pass Princes St. Gardens in 1846. It's the 2nd mainline train station in Edinburgh, with Waverley Station being the most busiest in the city, and this one being the 4th busiest station in Scotland. Over the years, many changes have been added to the station, including the Covered platforms being added back in 1894 by the engineer James Carswell, as well as the different tunnels being electrified over the years, allowing access for the East and West Coast lines and extending the various list of destinations that we can all travel to now. You can still see most of the old character of the station from the old entrance on the East side, and by looking at the National Cycle Network sign there, as well as inside that entrance where there is a monument in the form of the 1842 milepost marker for the Edinburgh to Glasgow line.
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But anyway, back to the cache! :)
The cache should be easy to get to, but please use Stealth as near a busy area. Incidentally it's a magnetic so if it's not where the hint says, and its on the ground, please replace it as mentioned in the hint. :)