Where's this?

摘要

Which Flight Of Locks is this, which canal is it on, and which major towns are linked by the railway line that crosses the viaduct? How many locks are there in the flight? And how many were there when it was originally built? IT'S GRAND SLUICE in Boston, Lincolnshire, on the River Witham, and the photo was taken from the tower of St Botolph's Church, more commonly known as Boston Stump.