Ruins of Barking Abbey

The remains of Barking Abbey sprawl across a corner of East London like a half-remembered dream. Once one of England's most powerful convents, founded in 666, what survives now are fragments of flint and stone walls, mostly from the 12th and 13th centuries, scattered across an open site that feels oddly peaceful given you're minutes from the A406.

You get the gatehouse ruins, bits of the abbey church walls, and enough interpretive signage to piece together what this place once was - a massive religious community where aristocratic women held genuine power and influence. The scale becomes apparent when you walk the perimeter; this wasn't some small chapel but a proper estate. History buffs will spend a good hour here, particularly if they read the information boards properly.

Families with younger children might find twenty minutes enough, though teenagers interested in medieval history will get more from it. The site is free and open access, which is handy - no tickets, no faffing about. Go early on a Saturday or any weekday morning to avoid the SE London residential crowds nearby.

If you're camping at Abbey Wood Experience Freedom Glamping just down the road, it's absolutely worth an evening walk over. Pair it with a stroll along the Thames Path toward Erith, or use it as a stop-off between Eltham Palace and Chislehurst Caves. Barking Abbey won't blow your mind, but it's genuine and underfussed in a way London attractions rarely manage.