View Larger Map Cold War bunkers, abandoned Tube stations, buried rivers, deep level shelters...London's concealed features are among its most intriguing. So, in age-old Londonist tradition, we've created a map to try and show what a hollow city this is. And we need your help. We've plotted the more obvious features - the Fleet River, Zone 1 ghost stations, the Kingsway telephone exchange, etc. But we know there's a lot more down there. Please use......

Video. Everyone's at it. After our recent clip showing the haunted vaults beneath London Bridge and Stompie the Bermondsey tank, we thought it was about time to make a regular slot for this not-so-new medium. So we'll be poking our lenses into all kinds of recondite places over the coming months. To kick things off, here's a walk along the Fleet River Valley - from King's Cross to Blackfriars - courtesy of Jamie Gregory.......

This Week In London’s History Monday – 21st January 1976: Concorde’s first commercial service, from London to Bahrain (and Paris to Rio de Janeiro) commences. Tuesday – 22nd January 1876: The Royal Aquarium opens in Westminster. It would be demolished just 26 years later and replaced by the Methodist Central Hall. Wednesday – 23rd January 1571: The Royal Exchange in the City of London is officially opened by Elizabeth I. Over the next few hundred......

Unleash the River Fleet! It still flows beneath Farringdon Road. Wouldn't it be an improvement to let it loose once more? Imagine canal trips from Blackfriars to Kings Cross. Keep sending in your distorted images of the capital. In fact, please resume sending them in, as we've ended up making the last two or three. And as you can see, we're not as good as you lot. Send entries to londonist - at -......

These guys know. They scaled the bastard a few weeks ago, apparently without any permission. Just walked in, climed up, and took some stunning pictures. They followed the ascent with a quick peek inside. There's major works going on everywhere, and we were dodging the workmen as much as we could. Finally, we came to the stadium in the centre of the dome. I had no idea this existed, or that it could possibly......

A tribute to the capital’s alleys, ginnels and snickleways 20. Faulkner's Alley Where? Runs parallel to Turnmill Street, between Cowcross Street and Benjamin Street. What? Wooooo! Spooky, eh? And so it should be. This little shortcut is 350 years old, predating the Great Fire. This part of Cowcross Street would have then overlooked the River Fleet, which today lies buried beneath the Metropolitan Line tracks. Back then, herds of cattle would have been herded daily......

A tribute to the capital’s alleys, ginnels and snickleways. 12. St Chad's Place Where? Dingy little dogleg behind King's Cross Thameslink. What? Ah, St Chad. You know, the brother of St Cedd and St Cynibild? Founder of the moanstery at Barrow-upon-Humber? Patron saint of rigged elections? No? Since ancient times, this spot contained a small, health-giving spring dedicated to the saint. St Chad's Well, was one of several ancient and important water supplies associated......

We like modern Italians so very much, what with their rich foods and fine wines, innate sense of style, glamorous crime syndicates and all that dolce vita stuff. But we love their Roman forbears, who came, saw, conquered and, most importantly for us, founded this great city we live in. So, with the BBC about to screen its raunchy new blockbuster series ‘Rome’, we went in search of Londinium, which Caesar’s geezers laid down......

A woman walks up to a bar. "Can I have a glass of water, please." A questioning look from the barman. "Could I see some proof of age, Madam?" No, it’s not some Orwellian union betwixt ID card legislation and the new drinking laws - not yet, anyway. Rather, it’s an exchange that’s sure to be heard this week on the South Bank, where over-18s are being offered the chance to drink the river......

A big park for posh people? A mountain-biker's paradise? Inspiration to some of England's greatest painters and poets? Or a sordid playground for fornicating couples and sodomists? Whatever your opinion of Hampstead Heath, you're probably right. The 800 acres of grasslands, meadows, woodland, ponds and bogs are truly all things to all people, and stand as a verdant reflection of London's diversity in minicosm (being too large to count as a microcosm). The Heath......