Feeling adventurous? Get into your hardhat, slip into your overalls, lock into the ladder system and descend approximately 20 metres below the prison to explore a labyrinth of tunnels built by prisoners. Discover original blast holes, bores, oil lamp recesses and artefacts from the days when working in the tunnels was hard labour for prisoners.

Guides lead the trek through dry sections of the tunnels on foot, before boarding replica convict punts to explore the submerged passageways accessible only by boat.

This tour is not recommended for pregnant women.

Participants must be physically fit and able, have the ability to climb independently, have the ability to understand tour conditions and follow staff instructions, must be a minimum of 40 kilograms and a maximum of 140 kilograms and not suffer from a fear of heights or claustrophobia. Please bring or wear socks and you must arrive sober (breath test applies).

Minimum age is 12 years. Children 12-15 years must be accompanied by an adult 18 years plus.

Those aged 16-17 years must have declaration forms signed by a parent or guardian, but can partake in the tour without an adult present.