Ribblehead Viaduct Sunset
The Ribblehead Viaduct at sunset (and behind it to the right, the Whernside peak - the highest point in Yorkshire, UK)
The Viaduct is an awe-inspiring piece of architecture - there are 24 arches, spanning a distance of 400m, and 30m above the ground. It was build between 1870-75, to carry the Settle to Carlisle railway.
To get a sense of the scale of the thing, check out this photo.