As it happens, I did get back to Paris last year, but found the whole experience oddly flat. That might have something to do with spending half a morning of a weekend trip trekking out into a commuter town to a museum only to find it closed (my fault for misreading the website). Still, I suppose it counts as an adventure of sorts.
There was some visual diversion:
Later in the year, a chance reference in a magazine article to "London's only stone circle" - which turned out to be almost local - had me walking up what seemed like one of the steepest streets in London to the aptly-named Hilly Fields, where there is... an undoubted circle of stones, with a sort of gateway, and a cracked slab marked with various dates. Not exactly Stonehenge or the Ring of Brodgar, or anything old - it turns out to have been a millennium project. But it is a pleasant park with some fine vistas of the leafier parts of south-east London and a café with nice cakes, so hardly a wasted trip.