Claims of concealed tunnels, buried explosives and priceless planes have surrounded Auckland's old North Head Army fort for decades.
While official records state there are some empty sealed compartments at North Head, a former local tells a different story.
Rob Osborne who grew up playing in the tunnels at North Head says he remembers parts of the complex, that officials now say don't exist.
While he never saw any buried ammunition, Osborne claims a section of tunnel large enough to drive an army truck through has been sealed over and wiped from the map.
He took Newshub Nation reporter Mike Wesley-Smith for a tour of North Head to show him where he thinks that sealed entrance is.
Watch the tour of North Head with Mr Osborne above and see Mike Wesley-Smith's full investigation into the tunnels here.