Extreme Engineering: The concept of building a tunnel across the Atlantic Ocean is talked about. It talks about the problems involved, and how it might someday be possible. At the end it examines the concept of a submarine hitting the tunnel, and how hopefully this wouldn't ruin it.
Documentary
Stream Extreme Engineering Season 01 Episode 03 in stunning HD on 123Movies, completely free. No account, no downloads — just instant access with English subtitles.