Wallingford Castle

The motte and bailey rises abruptly from the Thames-side meadows, a proper reminder that Wallingford was once seriously important. Built in 1066 by William the Conqueror himself, the castle now amounts to earthwork ramparts and a central mound - you won't find stone keeps or turrets here, but what remains tells the story of Norman ambition clearer than many ruins.

Climbing the mound takes five minutes and rewards you with views across the town and the river valley. It's free and accessible year-round, which makes it worth stopping for if you're passing through Wallingford. Families find it decent enough for an hour, though younger children might lose interest once they've scrambled to the top. History buffs will spend longer pondering its role in the Civil War - the castle changed hands repeatedly and was eventually slighted to prevent further use.

The real pull is the walk itself rather than dramatic structures. The surrounding meadows are lovely, and you can combine a visit with a stroll along the Thames Path, which runs nearby. Worth knowing: there's no visitor infrastructure, so bring your own supplies. Summer's the obvious choice, but winter actually gives clearer sightlines across the earthworks.

If you're camping at Bridge Villa, just 0.3 miles away, it's an obvious evening walk. The castle sits comfortably within a broader Oxfordshire itinerary - close enough to explore Wallingford's medieval town and accessible if you're basing yourself at any of the nearby parks.