We saw them from the train from Edinburgh to Glasgow, after we left Falkirk High station, so it couldn't be too far. Would Falkirk Grahamston be closer? Is it a bad walk through industrial areas or a nice walk through neighborhoods. We don't mind walking a couple of miles.
Or would it be better to get ourselves to the Falkirk wheel and then rent bikes to ride to the Kelpies? Is there a bike path along the canal? I believe I saw mention of that somewhere, maybe on the Helix website, along with a bike hire place near the Wheel. But I always like to ask for local knowledge and tips. We will be staying in Glasgow.