Mega Builders

Madrid's Big Dig (2x3)

Ημερομηνία προβολής: Ιαν 08, 2007

Under a sweltering sun in the heart of Madrid, Spanish construction workers are working non-stop on the job of a lifetime... the M-30 Madrid project. At a cost of 3.7 billion Euros it is the largest urban tunneling system ever undertaken, and one of the most challenging.