'lie below' is correct and usable in written English.
You can use it to describe something that is placed under or lower than something else. For example, "The ruins of the old castle lie below the hilltop."
All of England seemed to lie below, and I forgot about my aching thighs, sniffed the unpolluted air and enjoyed the sensation of soft earth under my feet.
The project historian, Brian Schools, was still studying the layers of dirt for anything that might still lie below, and another crew member was sketching the brick wall.
And this is only what we can see on the surface; the amounts that lie below are much, much greater.
As becomes clear, none of these modes yield a detectable IET signal (all η efficiency values lie below 0.7%).
Regent Street was also designed to subdue the chaotic medieval streets that lie below it.
These themes lie below the waterline, but they are perhaps the more menacing for being submerged.
Some geologists believe that one-quarter of the world's undiscovered oil and gas may lie below the thawing ice.
The feeling of leaving the Earth was the means of my escape from terror, from what might lie below.
Scientists are confident ice does lie below this charcoal coating – but are unsure of its exact depth.
Inside, gaudy shrines reek of incense, and offerings of money and food lie below gold statues of the guru himself.
Critics also blame delays in extending a flood-control canal that carried excess water from overflowing rivers in this city where some neighborhoods lie below sea level.
