The Greenwich Foot-Tunnel Answered
You might not know it, and you may never have walked through it (I have), but you may well have seen it.
The Greenwich Foot Tunnel opened in 1902 and runs under the River Thames, it's a popular spot for music-video.
As such, I'm offering patches to the first 5 people to post a video-link featuring the tunnel.
Denying you one, here's an example 3:20-30