They are synonymous with London and have become an iconic feature of the landscape.
Today we take a ride with Andrea Rose and Jean Dong as they find out more about the city's famous red double-decker buses.
The kind of double-decker bus in the picture is called a Routemaster, and these have been on London's roads since the 1950s.
They also appear in many films set in the capital, showing up alongside characters such as James Bond and Harry Potter.
But now the famous Routemasters are much rarer on the streets of London as they have been replaced by more modern buses.
We find out why this is and much more about London's much-loved double-deckers.