Falkirk Wheel

In 1822 the Scots dug a canal linking the River Clyde on the west with the 
Firth of Forth on the east, thus making a waterway connection across the 
island. The canal was in use for a few decades, then fell into disuse as railroads

connected the whole nation. In the late 1990s, they decided to reopen the canal, 
for tourism and economic development in central Scotland, and part of the 
reopening was the creation of the Falkirk Wheel, which replaces several of the 
original locks on the canal. I'm not sure whether it's an engineering marvel or 
just a big gadget, but it was something we have been wanting to see in 
operation. The poster photo gives some idea of how it works (one boat 
counterweighs the others). Above, the Canal, with the Wheel in the background.

Interestingly, the train goes under the canal

Closer-up of the Wheel

The poster photo

And they light it up at night...cool