blue bridge bridges cross destination dundee estuary journey journeying rail railway river scotland steel Tay train trains travel travelling water aged beam bulk endless endlessly grid handrail infinite iron metall metallic bridge no end off shore old old gateway path perspective rust rusty unlimited way way to nowhere weathered architecture Cheshire crossing high landmark landscape mersey road Runcorn river support traffic transport transportation uk widnes access barrier curved decay fence gleaming metal pedestrian railings shiny slope smooth urban walk cables central city clyde glasgow passenger people span steel.old suspend suspension Victorian walkway