The Falkirk Wheel, which is the world's first - and only - revolving boat lift, opened to the public in 2002 after its completion as part of the Millenium Link project re-connecting the Union and the Forth and Clyde canals. Scottish Canals operate the wheel offering boat trips and other activities. The Wheel only uses 1.5kWh of energy to turn, the same amount as it would take to boil 8 household kettles.
49. Falkirk Wheel turns 21
Hottest day of the year 2013 Photo: Michael Gillen
50. Falkirk Wheel turns 21
National Association of Inner Wheel Clubs Scottish members celebrate 90th anniversary 2014 Photo: Michael Gillen
51. Falkirk Wheel turns 21
Queen's Baton Relay 2014 Photo: Michael Gillen
52. Falkirk Wheel turns 21
Falkirk business Tapestry AV lighting The Falkirk Wheel to celebrate the NHS with Scottish Canals 2020 Photo: Michael Gillen