But it turned out the oval marked the former course of a long-gone river, and when he zoomed in, he found the rectangles were buried structures.

但事实证明，这个椭圆形标记着一条长河的上游段，当他放大镜头后，他发现那些矩形是隐藏的构造。

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Modern structures with big footprints interrupt the sea of red-tile roofs north of the river.

大面积的现代建筑物打破了亚诺河北面原来的那种大片的红瓦房子的传统结构。

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The Environment Agency said the Sheffield Lower Don Valley Flood Protection Project would involve repairs to existing defences, as well as "raising walls and reinforcing existing structures along a stretch of the River don between Nursery Street in Sheffield and Blackburn Brook near the M1".

BBC: South Yorkshire to get ?14m flood defences

Caroline Kay of the preservation trust said "structures such as this are not appropriate for the river basin in Bath".

BBC: Bath's last gasometer 'should be saved'

The sprawling estate on the Cornish side of the River Tamar is a handful, with 55 Grade I and II structures and four ancient monuments, four beaches and a deer park.

BBC: Historic Mount Edgcumbe's uncertain future