Not in the same league as you watching A4 Pacifics belting along the main line, but when I was in the First Form at my prep school, our 'nature walks' always used to coincide with the hissing and clanking of the 'Chard Snail' as it made its leisurely progress along the local branch line and we waved happily at the driver and fireman. Funny how the sun always shone in those days! Bit of a shame that we 'railway children' didn't have a Jenny Agutter to lust after at the time though.....