Once we finally found Kinnaird Castle, we took a slight detour over to Falkirk Wheel. It is the worlds only boat lift! It was quite an interesting site!! The purpose of designing the Falkirk Wheel was to connect two canals. The Forth and Clyde Canal lies about 115 feet below the Union Canal, so this 'wheel' will lift the boat up and around and lower it to the lower canal, thereby making a passage way across Scotland! We watched one complete cycle, as a tourist boat motored into a giant 'wheel', then the wheel began lifting and circling around bringing the boat to the lower level. At that lower level, another boat entered this wheel and was lifted to the upper water level. Here is a video of the Falkirk Wheel in action!! The 'blue' at the bottom of the picture is the tourist boat that has gone into the 'wheel' and it is being lifted up and around to the higher canal.
more info at this link here: Falkirk Wheel