Going down there....

They are pretty high up in the Prometheus, requiring an elevator to get to ground level. Also, the route to the Juggernaut is via an underground tunnel once they get to the pyramid, so "down there" is a reasonable choice of words, I would have thought.

Yes, you are Prometheus crazy. It doesn't matter.

"Down there" is very fitting indeed. Not only is the ship they entered below ground, the others are presumably below it, in caves that extend half a mile or more down.

"..others are presumably below it, in caves that extend half a mile or more down..." By others do you mean Juggernauts,..Rngineers...or both? Since the Pyramids were above ground,,and that is where the crew entered,,I sort of figures it was level. But that's not right,,because of the Jugggernaut rising from below ground. So perhaps 'Going down there..' would be the right words to use,,it was just that up to the final visit to see the Last Engineer,,,it was not obvious to me..that there was structure below ground.

@Indy John: Yeah, it wasn't obvious where the ship was relative to the pyramid. You see it come up out of the ground some distance from the pyramid, and the only clue to this is the probe they call a pup detecting a life form at one point. That was shown at the end of a tunnel extending away from the pyramid, at a distance of "about 1 clic", which is about 1 km. David says there are many other ships, which we can assume are juggernauts like the one that crashed and the one David and Shaw took at the end. In Prometheus 2, if the sequel is made, the action will probably begin on board that other ship, because it may be carrying plenty of other dangers, including other engineers. Shaw really needs to search the ship thoroughly, even though just going into the wrong room could cause another chain reaction like in the ampule/ altar room of the pyramid. The distinction of the ampule/ altar room being inside the pyramid as opposed to also onboard the juggernaut that crashed wasn't clearly made either, but it appears to be separate, and there are also plenty of unexplored areas of the pyramid. The ampule room is at the center, on the bottom, and there are upper floors and literally "countless" rooms inside the pyramid and down other tunnels. The potential for other engineers and events to be here is huge, and the writers of the sequel may exploit it with a new team from Earth, for example, which arrives for a simultaneous exploration as Shaw explores the engineers' home world. In a two hour movie, they could only explore so much, but they made some ridiculous assumptions it seemed--I mean in the crew's dialogue--about whether "all the engineers are dead", having searched such a small fraction of everything. There are also other pyramids, entirely separate from the one visited in the movie; all of which we might assume have their own ampule rooms and underground tunnels and caves which contain ships like hangars. In designing a new movie, if action would take place here, anything can be put here. The outbreak in the one pyramid might not have affected the others at all, and other types of alien ships can be discovered, etc.