The new underground road that replaced the city's elevated highway required seven massive air vents.
On his way through the underground roads, he met a miner who told him of having seen heavy machinery being moved along by an unknown force.
A partially underground road named "Kerntangente" was constructed to draw through-traffic away from the city centre.
The question of building an underground road in St. Petersburg arose back at the beginning of the 19th century.
Many arguments were advanced against the construction of an underground road.
It is not Westway, the underground road that residents waged war on and that the city abandoned in the 1980's.
But the planning group said the underground road would cost far less to maintain, saving tens of millions of dollars a year in repair costs.
The underground road went on, to destinations Petra did not bother trying to guess.
There is an underground road connecting New York and London.
Maguwo station are now equipped with underground road which connects passengers to the station.