‘That’ door next to Bristol Bridge/Castle Park that everyone knows!

‘That’ door next to Bristol Bridge/Castle Park that everyone knows!
In my opinion the best of the three transporter bridges in the UK. Located in Newport and crossing the River Usk, it’s the largest (overall) and is still in operation to this day.
A transporter bridge in Middlesborough that crosses the River Tees. Still in operation, it carries motor vehicles and pedestrians as part of the A178 road.
Not Dreadnaught! Often forgotten about, Rednaught is actually quite a long one.
Probably Bristol’s most visited storm drain. Extending underground from Bishopsworth to its outfall at the river Avon by Coronation Road, it’s a relatively easy one to walk albeit fairly uneventful.