If the rumours are to be believed, deep beneath the city of Canberra, is a series of connected tunnels providing safe passage and quick getaways to the country’s most powerful.

Some claim to have seen the entrances or vents of said tunnels, others appear willing to break non-disclosure clauses as they allege to have been inside themselves.

However, despite the apparent sightings, mystery continues to surround the supposed underground network.

An expert on the topic, Dr David Marshall, has spent years investigating the existence of the tunnels and revealed his findings on the Mix106.3 drive show ‘CBR Wrapped’.

Take a listen to the chat below: