Two weeks ago I finally visited the disused tram tunnel underneath Holborn Kingsway, a subterranean passage that was built for public transport just below street level, linking North and South London via Bloomsbury and The Embankment.
We met our guides at the top of the one in ten access slope at the junction of Southampton Row and Theobald's Road here. Note the impressive railings and lamp standards that protect the entrance. I'm simply going to show you some of my photos.
Pat and Kat were our guides on the day and their enthusiasm shone through. It's a really good tour, albeit a bit expensive, but you're only going to do it once. Find out lots more by experiencing the tour yourself through London Transport Museum's website here, where you'll also find archive images and more information.