Building Big

Season 1 Episode 5: Tunnels

What keeps a tunnel from collapsing? Tunnels have advanced from dangerous, claustrophobic passages to spacious, safe subterranean networks as roomy as shopping malls. Host David Macaulay takes viewers underground to explore the history and ingenuity behind some of the world's tunneling marvels.

Genre:

Documentary

Seasons:

1

Episodes:

5

Actor:

David Macaulay

Quality:

HD

Status:

Ended

First Air:

2000

IMDb:

-