A single photo of a Sydney train station has ignited curiosity around one of the city's quietest mysteries, a subtle sign that thousands of commuters walk past every day without noticing.

Sydney Trains are experiencing major delays this morning due to a man on the tracks at Redfern Station.

At Sydney's Central Station, commuters and visitors have noticed something about the sign reading 'Central' between platforms 20 and 21. The letter 'C' is noticeably smaller and appears in a ...

A picture posted to Reddit showed three Central Station signs in Sydney above the platforms. But, with the signs lined up it was noticeable that the ‘C’ on platforms 20 and 21 was smaller than ...