London has hundreds of thousands of bollards, and most of them are exactly what you'd expect: black, dented, forgettable. But the city has exactly one styled as a bobby — a bollard dressed up like a police officer, complete with the familiar helmet — and it has become a small cult favourite among the people who hunt the city's odder street details.

The "Bobby bollard" belongs to a long tradition of London turning its most mundane street furniture into something playful. Bollards themselves have a maritime backstory: the stubby posts that guard pavements across the capital are said to descend from old upturned cannons once used to keep carts off walkways. Over the centuries they've been cast in iron, painted in heritage colours and, occasionally, given a personality. The bobby version is the lone example of that last category — which is precisely why it gets photographed, shared and sought out.

Part of the charm is the treasure-hunt element. It's not signposted, it's not on any official map, and most Londoners walk past it without a glance. That makes it a classic entry in the genre of London micro-sightseeing: the tiny, free, slightly absurd things — a lone grass bank in the middle of a roundabout, a hidden Roman wall, a policeman-shaped bollard — that reward travellers who look up from the obvious itinerary. If you enjoy stuff like the seven noses of Soho or the city's smallest police station (yes, that's a thing, hidden in Trafalgar Square's southeast corner), this fits neatly into the same walking-day collection of oddities.

Why bother with a single bollard on a trip to one of the world's great cities? Because it's a lens on how London works. The capital layers whimsy onto utility everywhere — blue plaques on ordinary houses, ghost-themed plaques, oyster-shell-mosaic sculptures, and yes, decorated bollards. Spotting the bobby bollard costs nothing, takes a minute, and usually pairs well with a neighbourhood stroll and a pub stop nearby. It's the kind of detail that turns a generic city walk into a story you actually tell people afterwards.

If you're planning a quirks-of-London walking day, build it around clusters: street-art lanes in the East End, hidden Roman remnants in the City, and the small novelty landmarks dotted around central London. Keep your phone handy for the photo, but the real value is that these small finds push you down streets and through neighbourhoods you'd otherwise skip — which is where most of the good food, shops and atmosphere in London actually live.

A bollard won't replace the Tower or the British Museum. But as a bookmark for a slower, more curious way of seeing the city, London's one and only bobby bollard does its job perfectly.

Details on the bollard come from Secret London.