it's the Schuylkill River here in PA .
or maybe its the little Swatara Creek
seriously though . There are about 165 major rivers in the world.
that is just the Major ones known Today. if indeed this map goes back that far
you would need to know what rivers small & large existed then,
Their actual flow lines back then, & be able to narrow just one of them
down to fit the chart.
& who said River ? there are also Canyons & creeks, walking Paths and cave systems that
move(d) in that direction.
I agree . They should consider comparing the Holes to a Map of the Cave system they are in
first. which mapping the cave could take years itself unfortunately.and perhaps in their off season using them to a Map of the island.
see if each hole corresponds to a cave on the island.
personally though, I would want to excavate where they found the piece of wood,
if it wasn't a Plant by Production for drama.
perhaps there was a cave-in & the treasure is just out of range of the detector.
or the cave flooded at some point in the last 500 years & that piece of wood floated there from another part of the cave system.
If the treasure was removed, Why was the Rock pile Built to make it difficult to
get where it was ?
Excellent show last night in spite of all the off topic Fill to make it last an Hour.
and there is a good possibility the Treasure was found by someone smart enough to
keep their mouths shut . But That's why we are known as Treasure Hunters.
if there is still a chance, best to keep Hunting
When does season 2 Start ?