The Tube started shuttling Londoners through its vast network of tunnels more than 150 years ago. Photographer Bob Mazzer has spent 40 of those years capturing the London Underground commuters, shining a spotlight on the evolving subcultures that have popped up over time. A former job as a movie theater projectionist found him traveling on the Tube late at night, surrounded by a cast of characters. Mazzer’s work was shown in a Greater London Council exhibition at the Royal Festival Hall in the 1980s, but he’s been sharing his photos on Facebook recently. See more of Mazzer’s funny, touching, and surreal portraits of strangers on the London metro, which we spotted on Kottke, in our gallery.