HADRIAN’S WALL
CLINGING TO THE CONTOURS Across its 73 miles, Hadrian’s Wall is forced to negotiate the uncompromising undulations of northern England
ALAMY X2, GETTY X3, ENGLISH HERITAGE X2
Whether to carve up the governance of a disputed city (such as postwar Berlin) or to provide headline-grabbing news during an election campaign (think Donald Trump’s plans to curb illegal immigration from Mexico), the makers of history have often been in favour of the construction of a wall to protect citizens from neighbouring – and supposedly undesirable – elements.