Parts of the Tube have turned into an American-style metro on one of the world's most popular digital maps.
New figures show people are more likely to fall victim to theft on the Circle and Hammersmith & City lines than any other Underground line.
Here's one way of brightening up the commute around the capital.
Transport for London said it is aiming to make it easier for customers to travel on the Tube by introducing smartphone payments on the service.
Shashi Verma, TfL’s Director of Customer Experience, said:
We are continuing to modernise all our transport services to make it easier for customers to do business with us.
The upgrade to our readers to accept contactless payment cards also makes them capable of accepting suitable payment applications on mobile phones.
We are testing to see how the devices perform on the system and welcome any innovations which improve the services and choices we are able to offer customers.
Tube passengers will be able to pay for their travel using smartphones by the end of the year, Transport for London has confirmed.
Mobile phones with a payment app will be able to open ticket barriers across the Underground network.
Transport for London said staff, stakeholders and selected members of the public were currently testing the system ahead of the launch to the general public later this year.
Contactless payment was launched on London's buses in December 2012 and more than 11.5 million journeys have been made using the payment option.
It was announced earlier this month that commuters will no longer be able to pay using cash on London buses from Sunday July 6.
Commuters endured a difficult return to work after the Easter break as delays affected six Underground lines this morning.
The Piccadilly Line suffered severe delays after signal failures at King's Cross and Ealing Common while a faulty train affected services on the Jubilee Line.
Commuters also reported queues at Waterloo station as a result of the delays.
Signal problems near Finchley Road also led to delays to trains on the Metropolitan, Hammersmith & City and Circle lines.
Passengers will face further disruption from tomorrow as a result of the modernisation of Bond Street station with Central Line trains not stopping there until late June.
No service btn Piccadilly Circus and Elephant & Castle and Severe delays on rest of line while we fix a faulty train at Lambeth North.
Severe delays are occurring on the entire line due to an earlier faulty train
– Andrew Murrison MP, Defence Minister
The Ministry of Defence is committed to selling off its surplus land and property in order to provide the best possible value for money to the taxpayer. At the same time we take our role as a custodian of the nation’s history very seriously and have been working to record the historic significance of the building.”
The 28,000 square feet property contains a drill hall, garages, offices and mess above ground and has recently has been occupied by the London University Air Squadron, the London University Royal Naval Unit and 46F Squadron Air Training Corps.
There are also several subterranean areas, previously used as part of the former Brompton Road Underground Station, but these have been left largely unused since the end of the Second World War.
There are few relics left other than a large map of London and the MOD is working with the National Archives to ensure the map is recorded.
The former Brompton Road tube station, a disused station on the Piccadilly line between South Kensington and Knightsbridge which has been sold for £53 million by the Ministry of Defence.
Brompton Road Tube station, in an expensive corner of London near Harrods, was put on the market in September by the MoD as part of cost-cutting efforts. It is now expected to be used for mainly residential development, with the money from the sale going back into the defence budget.