Ben van Kerkwyk

So that's what I like about South America.

Once you see it in South America, it's very clear because you just, you know, again, in Egypt, you just had a longer ancient civilization that were able to develop higher capabilities than, say, the Inca did.

In fact, the quarry for this stone is way on that other mountain across the valley at the top.

You can't quite see it, but they hauled these big blocks over very difficult terrain at height.

This is still 10,000 feet.

It'd be 100 tons at least.

I mean, it's Sacsayhuaman.

You're closer to 200 tons.

I think at Tiwanaku, the biggest sandstone block, I might be right.

It's something like almost 300, 400 tons, something like that, 300 maybe.

It's a big red sandstone block.

No, we've seen others, particularly in Tiwanaku.

I mean, this is actually up at the quarry.

So this is... Yeah, this is up at the... Up that other mountain we hiked up.

And it... I can't imagine trying to carry a ton of rocks up here.

This was hard enough.

But...

Yeah, so in Tiwanaku, you certainly see a lot more evidence for tool marks.

In South America, you have tubular drills, you have all sorts of kind of crazy, what look like tool marks and functional aspects of stone in particularly places like the Coricancha, which is the big central structure in Cusco.

It was this, today it's a Catholic church, but it's megalithic and the inside walls have all, I mean, some of the blocks have been put out and are on display and there's a lot of the inside structures that are still there.