The oldest tube line in London is the Metropolitan Line.
It opened in 1863, making it the world's first underground railway. This line, initially known as the Metropolitan Railway, ran between Paddington and Farringdon.
The Metropolitan Line is still in operation today, and it has since been extended to cover a much larger area. The line is known for its distinctive brown color on the London Underground map.
While the Metropolitan Line is the oldest in London, it is not the oldest underground railway in the world. That honor belongs to the London Underground, which opened in 1863. The London Underground is a network of lines, and the Metropolitan Line is just one part of it.
The London Underground is a complex and fascinating system, and it has played a vital role in the development of London for over 150 years.
