With sewers, water pipes, bunkers and basements, it's a maze under this city. We've been doing some digging ourselves to see how deep London goes.
Dinner plans tonight? How about gorging on the finest Ethiopian and Eritrean food in London?
It's Monday so treat yourself: how about something from one of London's best chocolate shops?
Here's all your London news from this weekend, served up in bite-sized pieces just the way you like it.
Things to do today:
FINE ART SOCIETY: See five floors of art celebrating the history of The Fine Art Society, London's oldest art dealership still in its original location. Work from 40 artists, including Edward Bawden, Samuel Palmer and Whistler, reflects the society's diverse 140 year history. Free, just turn up, 10am-6pm
STREET FOOD: Start your week with tasty treats at Vauxhall Street Food Garden. Even if you're not hungry, visit Lambeth Place, relax in its urban oasis and inhale the scrumptious smells. Free, just turn up, 11.30am-10pm
FOTOCLUB: The snap happy can get their fix tonight at Fotoclub Social. Whether you're filtered perfection thanks to Instagram or a Pentax enthusiast, head to the secret location near King's Cross. Meet other snappers, take some pictures and get involved in the photography challenge. £10, prebook, 6.30pm
More things to do after today's sponsor.
Don't miss your chance to catch this boat!
Hit musical Show Boat makes a splash in the West End until 27 August 2016
Set against the backdrop of America’s Deep South at the turn of the 20th century, Show Boat tells a powerful story of freedom, loyalty and love. The show’s Broadway premiere in 1927 changed musical theatre forever.
This lavish new production proves its themes and music remain as vital, passionate and moving as ever, featuring classic songs Ol’ Man River, Make Believe and Can’t Help Lovin’ Dat Man from Jerome Kern, with lyrics and book by Oscar Hammerstein II.
Directed by Daniel Evans, this sparkling version has been scooping five star reviews and was praised in the Londonist review as “packed with polish and pizzazz”. So don't miss your chance to see one of the most romantic musicals of all time. Hop aboard the Cotton Blossom this summer and be swept away by Show Boat.
Show Boat is at New London Theatre until 27 August 2016. Tickets start from £19.50 and are available online.
GIN NIGHT: Start the week with "Mother's ruin" at this gin social at Graphic Bar. Tonight the spotlight's on Langleys No. 8, a blend still produced in "Connie" — a 1960s copper pot. Sip from a complimentary G&T and a special cocktail. £6.47, prebook, 6.30pm
CRAFT BEER: Discussing his new book, Craft Brew: 50 Recipes from the World's Best Craft Breweries, Euan Ferguson heads to Waterstones Piccadilly for an evening of tasting and discussion about the brewing the beer you want to drink. £5, prebook, 6.30pm
UKULELE HOOTENANY: Plink away any Monday blues. Grab your uke (or rent one there for free) to jam away to old classics and modern hits. Beginners and the uke-curious welcome at the Queen Of Hoxton. Free (£20 deposit to rent a ukulele), just turn up, 7pm
COMEDY: After scooping five star reviews and wowing Edinburgh, HUB return to Pleasance Theatre with hilarity from Lazy Susan, Luke Kempner, Matt Winning and more. £5, prebook, 8pm
Good cause of the day
It's a while away, but tickets are getting snapped up already for this year's Dream Ball at Lancaster House. Raising funds for the Prince's Trust and Big Change Charitable Trust, this black tie ball is themed around aspiration and inspiring young people to achieve. Hosted by Anton Du Beke and featuring live music, an auction and raffle, grab your place for one of the summer's biggest charity events. £250-£1,000, prebook, 6.30pm, 7 July 2016