Not that much of a secret, more a little known fact....
Rochdale, Greater Manchester (my hometown) was for many a year in the Guinness book of records for having the world's widest bridge.
It wasn't a particularly long bridge, it was just very, very wide. So wide in fact that half the town centre was built on it. Maybe that's why the GBofR decided to rule against it in the end. I don't think it's ever been beaten though. By a bridge bridge, that is.
BONUS FACT - the town was also the birthplace of the Pioneers. The original name for the co-op movement. The town centre's branch shared the name even.