Secrets of the Underground is one of Londonist's most-watched series, racking up millions of views.
In it, Geoff Marshall, former Guinness World Record holder for visiting all stations on the Underground in one day, explores the city's iconic transport network uncovers trivia you can impress your friends with.
If you've never seen the series, enjoy this classic about the Circle line, in which he uncovers little-known shortcuts and a memorial to a deceased station cat.
Written and presented by Geoff Marshall. Camera and direction by Steven Francis.
- Secrets of the Bakerloo Line
- Secrets of the Central Line
- Secrets of the District Line
- Secrets of the Hammersmith and City Line
- Secrets of the Jubilee Line
- Secrets of the Northern Line
- Secrets of the Piccadilly Line
- Secrets of the Victoria Line
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