The tunnel finally debouched into a lesser crevice, one running at right angles to the Gap Chasm but intersecting it well above the base, so that we could not have entered here without using the worm tunnel.

Fifty meters farther along, the tunnel debouched into a main corridor.

The cavernous tunnel they'd been following so long debouched into what seemed a far vaster space steaming with vapors, and then they were suddenly brought up short against a great wall that seemed to extend indefinitely upward and to either side.

She reached the base of the curve, and the tunnel debouched into another full sized passage below.

The tunnel debouched into an ugly forest whose twisted trees seemed about to clutch at any travelers, and these flinched as the path skirted the trees.

The tunnel debouched into a wide room before the moonlight played out, an empty cavern of no great dimensions, but with a lofty, vaulted roof, glowing with a phosphorescent encrustation, which, as Conan knew, was a common phenomenon in that part of the world.

The tunnel debouched into a small room.