In London, the UK capital, in 1863, a significant event happened - was opened the world's first metro line. The idea originated from the English engineer H. Pearson in 1843. But to realize his idea, he could not very soon. The work was carried out in open trenches or shallow. First on the rails went locomotives, and only in 1906 began to run trains. By 1912 the entire metro was updated.
An interesting fact is that after London in the nineteenth century metro did not appear in the largest densely populated Western European capitals and provincial for that time Athens, Glasgow and Budapest.
Today, the London underground has changed a lot, now it has over 300 stations and is divided into 6 zones, which cover the city center to the outskirts.