The Kelpies, the stunning equine statues gracing the eastern entrance to the Forth & Clyde Canal, are named after mythical Scottish water-horses. The two 30m-tall horse's heads are fashioned out of stainless steel, and are a tribute to the working horses that once hauled barges along the canal. You can view them for free (indeed, they are clearly visible from the M9 motorway between Edinburgh and Stirling), but the 45-minute guided tour takes you inside the sculptures.