While searching the property, the man stumbled across an old wardrobe filled with unfinished art projects.
Beneath the items he uncovered a false bottom to the furniture, and after carefully removing it, he found a secret compartment.
Carefully brushing away the dirt, the man soon realised the door was for a safe and so quickly grabbed some power tools to break it open.
And what he found inside was amazing.
DID YOU KNOW?
ASTONISHING: The man shared what he found online
A small black bag was laid within the box where he found an object alongside a lone note.
The message — believed to be written by his grandad — read simply “abandon all regret he who enter here".
It is believed to be a play on the famous passage from Dante’s Inferno, “abandon all hope he who enter here,” which was writtern above the entrance to hell.
Accompanying the note, he found an old leather pouch with a faint stamp on it that read 1776.
Hidden treasure: could you be sitting on a FORTUNE?
Amateur metal detectorists have been unearthing hoards of treasure on these shores for years. Could you be sitting on top of a fortune?UIG via Getty Images This hoard of 126 rare Roman coins was found in Didcot in 1995 by an amateur metal detectorist.
And even more astonishing, he discovered a pocket watch inside, protected by a British Army issue barrel cloth.
Alongside these mysteries were stamps from countries all over the world — including states that no longer exist including the Soviet Union, Zaire and the Sahrawi Arab Democratic Republic.
The bloke also found several other bits including photos of his grandad, several old coins and a key.
He uploaded his amazing discovery to website Imgur, under the username of Todirel.
It has since been shared on a number of YouTube channels including Did You Know? where it has racked up more than 32,000 views.