Thames Barrier Park

The Thames Barrier itself dominates the landscape - ten silver gates rising out of the river like something between architecture and engineering marvel. But the park wrapped around it is what keeps you there. You're walking manicured paths above the flood defences with the docks and the bend of the river constantly in your sight line, and it's genuinely difficult to believe you're still in London.

The design is clever rather than fussy. Sunken gardens, timber boardwalks, open spaces that feel intentional rather than accidental. On a decent day the views stretch far enough that you forget the city's there. Worth coming back in different seasons - spring's all blossom and energy, autumn feels properly reflective.

It works best for walkers and photographers rather than families with small children who need constant activity. You can move through it in 45 minutes if you're purposeful, but the sort of person who comes here usually lingers. The barrier itself is free to access, though the visitor centre charges admission if it's open.

If you're staying at Abbey Wood Experience Freedom Glamping nearby, this is an easy addition to a day out without feeling tacked on. The area's improving fast - there's decent food around now, and it's increasingly less of a trek from central London than it once was. Go on a day with good light. The whole point is the river and sky.