Central park, Cowdenbeath. There isn't a dedicated away 'end', but the whole ground is a crumbling, demoralised ruin. A decent view of the game is impossible due to fencing/grandstand poles. What a dump.
East Stirling's Firs Park is like a run down Glasgow juniors ground- dandelions on the pitch last season, out of date advertising hoardings slowly rusting away, and shale terracing under a corroding corrugated roof. Only beats Cowden because one can actually see the game.
Albion Rovers' Cliftonhill ground is a khazi as well. 3/4s of it, other than the main stand, is condemned. View from said stand is poor, owing to thick glass windows at either end of the stand, marinaded in 50 years worth of unfiltered Craven 'A' smoke, and poles. Venture down the front, and you have to avoid the water feature caused by a massive hole in the stand roof guttering, which on Coatbridge's frequent monsoon days can cause water to pish right onto you.
In England, the worst away end I've probably been to is Barnet. Looks like a fucking temporary stand from the summer Open championships, with hideous green plastic seats exposed to the elements.