London Underground marks 150 years

World’s first underground rail system now carries more than one billion people each year.

It has been 150 years since London opened the world’s first underground rail system.

At the time, the tube was an engineering marvel that ran almost 650km.

Today, the transport system carries more than a billion passengers a year.

Al Jazeera’s Laurence Lee reports from London.

Source: Al Jazeera