As they descended, they started to hit tunnels. While the tunnel walls before were lined with patterns to assist climbing, now, they were lined with perfectly square holes, each going farther than Vyraena's light could shine.
"There must be miles of tunnels all around us. If they were as advanced as the memories said, there's all kinds of facilities down here. Schools, doctors, stores, homes...an expedition could spend decades mapping this place out" Kruz'Iik said, marveling at the possibilities. Of course, for someone who could abandon their physical shell like Kruz'Iik, exploring this place would be only a manner of days.
The further and further down they went, the louder the underground river got, until they finally hit actual ground, coming to a stop inside a shallow stream just slightly deeper than the ankles.