From 29 September to 15 October this year, children under 16 accompanied by an adult can get in free to Sydney Tower and OzTrek.

Families just need to download a voucher from the attraction’s website.

The Sydney Tower + OzTrek experience begins with the OzTrek chambers – a rotating auditorium that spins visitors through four Australian landscapes.

They then move through a replica cave lined with Aboriginal-style etchings before experiencing a motion theatre boasting six-metre high, 180-degree screens; sound effects and moving seats to learn about Australia’s history and geography.

The visit will also include the Observation Deck at the top of Sydney Tower, which offers 360-degree views of Sydney, as well as 85km beyond towards the Blue Mountains, the Central Coast and South Coast. Details: www.sydneytoweroztrek.com.au