That is a comment that shows a distinct lack of knowledge.
The Forth Rail Bridge is one of the most iconic in the World, it opened in 1890 and is right up there in terms of world importance.
Some other iconic Bridges in the UK:-
Ironbridge
Without doubt and arguably the most important Bridge in the World.
Clifton Suspension Bridge, Bristol.
Without this Bridge there would be no Golden Gate Bridge, the Clifton Suspension Bridge is another World Heritage structure.
Others:-
Tower Bridge in London
Humber Bridge in Hull
Severn Bridge near Bristol
Menai Straights Wales
Another cr4p lacking feature is the omission of Blackpool Tower, its 800 feet high and far more important than some rubbish USA landmarks that are included
Just look at the photo real cities included, dozens of USA ones, many totally unknown to us outside the USA yet historically important Cities in the UK are not included, York, Chester, Edinburgh even for goodness sake the most important Theatre in the World is just a white blob, fly over The RSC in Stratford Upon Avon to see what I mean but before you rubbish that comment bear in mind that without William Shakespeare theatre would be vastly different today and Hollywood would not exist in its present form.