
London Underground Baker Street Roundel —
Baker Street was one of the original stops on London's Underground system. The station, near the home of fictional detective Sherlock Holmes, opened in 1863.

London Underground: A journey through city's past and present —
The Underground roundel first appeared in 1908, but the design was reworked in 1917 to incorporate Edward Johnston's distinctive typeface.

London Underground: A journey through city's past and present —
The design of "Johnston's roundels" was simplified in the 1940s to reflect graphic design trends and to cut manufacturing costs amid post-War austerity.

London Underground: A journey through city's past and present —
Earl's Court has been home to generations of travelling Australians. The Tube line runs underneath the exhibition center which played host to London 2012 Olympic events.

London Underground: A journey through city's past and present —
In English, Piccadilly Circus is synonymous with traffic chaos. Several routes meet at the busy road junction above the Tube station, in the heart of London's theaterland.

London Underground: A journey through city's past and present —
Just outside Tower Hill station, a short walk from the Tower of London, you can see one of the largest remaining segments of the city's original Roman wall.

London Underground: A journey through city's past and present —
Movie fans might recognize this station, which features in the 1981 horror classic "An American Werewolf in London." The station includes mosaics by Eduardo Paolozzi.

London Underground Oakwood Roundel —
London Underground manages 10 per cent of the city's green spaces. Wildlife such as woodpeckers, deer, sparrowhawks and bats can be spotted along the network.

London Underground: A journey through city's past and present —
Oxford Circus station is one of the busiest on the network because of the numbers of passengers heading to London's West End shopping district.

London Underground: A journey through city's past and present —
Charing Cross station used to be known as Trafalgar Square, which many regard as the center of the capital.

London Underground: A journey through city's past and present —
During the First and Second World Wars, the tunnels near Holborn Station were used to store exhibits from the nearby British Museum, and as an air-raid shelter.

London Underground: A journey through city's past and present —
For decades, music lovers have disembarked at Hammersmith in west London on their way to local venues, including the Apollo and the now-defunct Palais.

London Underground: A journey through city's past and present —
Knightsbridge is known for its upmarket boutiques and department stores, including Harrods and Harvey Nichols.

London Underground: A journey through city's past and present —
Liverpool Street is one of the busiest stations on the network, due to its location in the City of London, the capital's financial district.

London Underground: A journey through city's past and present —
The London Underground network is made up of 249 miles (402 km) of track, 270 stations, 4134 Carriages, 426 escalators and 164 lifts.

London Underground: A journey through city's past and present —
South Kensington is home to some of the capital's most popular visitor attractions, including the Natural History Museum, Science Museum and Victoria and Albert Museum.

London Underground: A journey through city's past and present —
Brixton is well known for its vibrant, multicultural and diverse communities, the bustling markets and most notably the creative energies of its residents and businesses.

London Underground: A journey through city's past and present —
Although it is named the Underground, only 45 per cent of the network runs in tunnels beneath the city.

London Underground: A journey through city's past and present —
Alight here for Sir Christopher Wren's masterpiece cathedral.

London Underground: A journey through city's past and present —
The record for the fastest time to travel to all the stations on the Underground network is 16 hours, 29 minutes, 13 seconds, set by Andy James and Steve Wilson in 2011.

London Underground: A journey through city's past and present —
Each Tube train travels 114,500 miles (184,269 km) each year.

London Underground: A journey through city's past and present —
During the 2012 Olympic Games, the London Underground had its busiest ever day with 4.4 million passengers.