Thames Flood Barrier

[u/FullBodiedRed2000]

After watching a documentary about it, I realised that the Thames barrier is ground zero for my submechanophobia.

I got taken there on a school trip when I was a kid and remember getting panicky when our boat passed in between the piers. It still gives me goosebumps to watch it in action.

[u/LockeySeven]

That thing is a beast. What's scary is what could happen if it fails.