[metal detector beeping] - --isolate that clump.
NARRATOR: In the northern Philippines,
John Casey and Manny Paez are inside a cave
searching for what they hope is Yamashita's treasure.
After running into problems at their first dig site,
Breach 6--
How the hell would silt get in here?
NARRATOR: --they turned to advanced technology
to find another way into the mountain.
This right here could be a cave entrance.
NARRATOR: Inside the cave, they've discovered
a group of coded symbols.
Markers on these rocks.
NARRATOR: And after triangulating them together,
the team found a rock marked with a distinct X--
There's a chisel mark in this thing of an X.
NARRATOR: --which John believes could be concealing
a small treasure, a larger chamber,
or possibly even the entrance to a network of tunnels.
It's a marker telling us, get the shovel.
We're going to dig right now.
[metal detector beeping]
NARRATOR: Before breaking ground,
John gives the area one last sweep with his metal detector.
We got a pretty decent-size target.
When I cross over the center, I'm
getting a really decent hit.
It could be a barrel of anything, you know,
a barrel of coins.
Yeah, this rock could be marking the entrance to a tunnel,
for all I know.
Hey, Manny?
MANNY: Yeah.
I'm super suspicious that it's too easy, you know,
that that marker is just way out right in the blatant open.
That marker over there, it's just alone by itself.
Why?
Then why does it line up to that one almost
in a perfect triangle?
There's something very suspicious about it.
Maybe they're trying to trick you.
The giveaway marker, the triangulation and the X marker,
line up way too easy.
There's something about it that's a little fishy.
It's making me a little nervous--
hesitant to go forward.
My gut is telling me it's--
there's something wrong here.
Just digging on it could be disastrous.
So don't put a shovel in the ground just yet.
We've just got to be smarter than them
and figure it out safely.
MANNY: All right.
In all my years of treasure hunting,
I've never seen X marks the spot.
We have to look around a little further because there's
just something not right.
I'm getting a bad feeling.
Oh.
That's a flower.
In the Yamashita codes, that means bomb.
[explosion]
That's no good.
I'm not going to take any chances
in triggering that bomb.
NARRATOR: In order to investigate the cave safely,
the team has invited an explosive ordinance
and military expert to the mountain.
Somebody call for a bomb guy?
Chad Higginbotham.
Pete Struzzieri.
Good to meet you.
John Casey.
Good to meet you, John.
NARRATOR: John and Manny lead Chad to the top of the mountain
so they can get his expert opinion
about what they're possibly dealing with inside the cave.
JOHN: I've been dying to get back into this cave
and keep exploring, but it's been too dangerous.
So now that Chad's here, we can get back in there
and safely explore what may have been one
of Yamashita's headquarters.
Let me take a look around for a minute.
Y'all just kind of hang out right here.
JOHN: Sure thing.
[music playing]
NARRATOR: General Yamashita is reported
to have placed booby traps within all Golden
Lily treasure sites.
Using his years of ordnance disposal experience,
Chad explores the cave interior for signs
of old World War II explosives.
All right, I don't see anything obvious.
NARRATOR: With Chad's approval, John and Manny start digging
around the X-marked rock.
Whoop.
Oh, hold on, boys.
Hold on a second.
What do you got?
Oh.
Look at that.
[laughs]
We found a coin, boys.
Look at that.
That's definitely a coin.
That's not garbage.
Yep, it is.
You want to clean it up?
Yeah, we got some water?
Oh.
Can I see it?
It's the first piece of treasure we found on this site.
Oh, I'm so excited.
Where there's one, there's two, baby.
Oh, that's freakin' killer.
Let's see it a little closer.
CHAD: Finding something like that in here,
it's a pretty good sign for you.
No doubt.
Finding this coin is great.
But what the hell is it doing 5,000 feet up a mountain
buried next to a rock with an X on it?
Oh, Manny.
We have to share it with Pete.
He's going to be stoked.
Put it somewhere safe now.
MANNY: It's a good site, John.
It's a beautiful day.
[music playing]