But the trees are still alive.

So that means that there's still water here somewhere.

And if you pay enough attention, the desert

will show you where to look.

I'm just looking at these four-leaf ferns here.

There's more green at this plant than I've seen anywhere else.

So might be promising.

(VOICEOVER)- This vegetation could be

the X on a hidden treasure map.

I know that this plant needs a lot of water.

So for it to be alive, there has to be a water

source just below the surface.

Yeah.

There must be some sort of spring,

because I know that the water table in this river's

got to be lower than this.

Yeah.

That is wet mud, for sure.

Oh, yeah.

It's in there.

Look at that.

Water.

Oh, this is good.

This is good.

And it's really cold.

This is coming from somewhere deep underground.

(VOICEOVER)- Large sand grains like these hold nearly twice

as much water as fine sand.

It's an incredible find.

And it'll keep me out of danger for a few more hours.

It's getting really easy to dig now.

Oh, yeah.

There's water.

Yup.

Nice.

Muddy water, but it's water.

I'll wet this cloth.

(VOICEOVER)- Since this spring comes from deep underground,

it's not likely to be contaminated by animal waste

or flying insects carrying diseases, making

it my best option for drinking.

It's gritty water.

But this is great.

I am really happy with what I got.

(VOICEOVER)- I may not find any more water today.

So I need to make the most of this.

Basically, I'm held hostage to this waterhole

until I get my fill of water as much as I can drink,

because I don't know if I'll be this lucky as I keep moving on.