The Union Canal

I like canals - they are straight and peaceful, and don't the tow paths come in handy for walking?

It was originally known as the Edinburgh and Glasgow Union Canal, to celebrate the uniting of the two cities by the new canal network, but this name is rarely used today. The canal was designed by Hugh Baird, who oversaw the engineering work while it was being built between 1818 and 1822. Two of its construction workers were the famous murderers Burke and Hare.

This is near Hermiston at

W 003º 18' 54.6"
N 55º 55' 12.0"

It was built as a contour canal - at a steady height of 240 feet above sea level.