The total length of the elevated and underground railway was now 10.1 km.

He told me it would be easier to get to the underground railway from the side street.

For one thing, the story is now set in 1775, when the underground railway really didn't exist.

In the 1970s, a project to create an underground railway was similarly rejected.

There are underground railways in this city, the gun-slinger said.

Friendly Belgians moved him from one home to another at night on an underground railway.

Since 1975 it has been a major tourist attraction, featuring its own underground railway.

The old terminal, originally constructed in 1927, became the world's first with an underground railway.

As a result, it took nearly 23 years to completely construct a 17 km underground railway.

My family still has a station on the underground railway, sir.