Piccadilly Line

Piccadilly LineGreen Park to Covent Garden, featuring a cricket bat and Sherlock Holmes


Central Line

Central LineBank to Chancery Lane, featuring pineapples and a helicopter


District Line

District LineVictoria to Embankment, featuring boozy politicians and secret glimpses of Tube trains



Inspired by my book Walk the Lines: the London Underground - Overground, each of these trivia-packed walks uncovers London’s history by following a section of a Tube line ... at street level.

When a city is as littered with intriguing curiosities as this one, you need a framework to make sense of it all. What better framework than the Underground system? Join me as we take a stroll along a stretch of Tube line, learning about the secrets and oddities we pass along the way.

As seen on the Time Out London blog

On the District Line we’ll learn how long it's going to take Big Ben to fall over ... the Piccadilly Line will reveal why Paul McCartney is the only person allowed to whistle in the Burlington Arcade ... while walking the Central Line we’ll discover what Nelson’s coffin is made from.

Each walk takes approximately 90 minutes and costs £8. Unless you’re older than Churchill was when he became Prime Minister (65), or younger than the number of stations on the Victoria Line (16), in which case you’re welcome along for £5. There’s no need to pre-book – just turn up.

I’m also happy to arrange specially-tailored walks for private individuals or groups – please drop me an email for details.

‘Mark Mason is one of our heroes’Time Out

‘Lots of information one usually doesn't get' - Barbara, Germany

‘I can't recommend these tours highly enough.' - Jonny, London

‘Excellent knowledge! Can totally recommend Mark as a walking tour guide. Had great fun!' - Laura, London

Calendar of Walks...

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Rubik's Cube

A Rubik’s cube has more combinations than light travels inches in a century. This is my favourite illustration of how a very small number of factors can produce an absurdly complicated situation. A silly little toy, with only three squares in each of its three dimensions. How can that get complicated? Well, as anyone who's ever tried to solve one just by guessing will tell you, it gets very complicated. The number of possible combinations is 43,252,003,274,489,856,000. Forget billions - that's 43 quintillion and change. (In fact the cube's manufacturers just said ‘billions' in their advertising, figuring that no one would know what a quintillion was. It's a billion billion.) The number of inches light travels in a century, meanwhile, is a mere 37,165,049,856,000,000,000. Or thereabouts.