Birmingham, commonly known as 'Brum' is the second largest city in the United Kingdom. It is located in the West Midlands region of England and is the most populous British city outside of London. The city is known for its industrial heritage, having been a major manufacturing centre during the Industrial Revolution. Birmingham is also home to the world's oldest working steam engine, the Puffing Billy, which is housed in the city's Museum of Science and Industry. Additionally, the city is home to a number of iconic landmarks, such as the Bullring shopping centre and the National Sea Life Centre. Birmingham is also known for its public transport system, which includes the iconic red double-decker buses and the iconic prams.