The tunnel stretched before them for miles on end, weaving left, right, on a constant path downward. It came to a point that Alex wondered if they had stayed on the Earth plane, how far under Jeju or the ocean they would be right now.
Of course, there was no use thinking of this, since they weren't even on the same plane of existence anymore.
Traps sprung on them every mile or so, their danger levels varying from mild inconveniences to deadly traps, were they not prepared and on the watch for them. Their progress was hindered, yes, but they kept trudging forward.
That was, at least, until they a snarl ahead of them, and the tunnel opened up to a new cavern, this one larger than all the previous ones.