Houghton Mill is an 18th-century watermill on the River Great Ouse, preserved by the National Trust in the village of Houghton just east of Huntingdon. It is the kind of small historic site that repays attention: heavy timbers, milling machinery, river channels, and the practical engineering of grain, water, and village life.
The mill sits beside Waterclose Meadows, so the visit pairs naturally with a riverside walk or a gentle cycle route through the Ouse valley. Check opening times before going, since interior access and demonstrations vary. Even when you keep the visit simple, the setting gives Huntingdon a more tangible link to the river landscape around it.