Among them, perhaps the most remarkable
are the great roads, the broken remains of which are still in
sufficient preservation to attest their former magnificence.
There were many of these roads, traversing different parts of the
kingdom; but the most considerable were the two which extended
from Quito to Cuzco, and, again diverging from the capital,
continued in a southern direction towards Chili.
One of these roads passed over the grand plateau, and the other
along the lowlands on the borders of the ocean. The former was
much the more difficult achievement, from the character of the
country. It was conducted over pathless sierras buried in snow;
galleries were cut for leagues through the living rock; rivers
were crossed by means of bridges that swung suspended in the air;
precipices were scaled by stairways hewn out of the native bed;
ravines of hideous depth were filled up with solid masonry; in
short, all the difficulties that beset a wild and mountainous
region, and which might appall the most courageous engineer of
modern times, were encountered and successfully overcome. The
length of the road, of which scattered fragments only remain, is
variously estimated, from fifteen hundred to two thousand miles;
and stone pillars, in the manner of European milestones, were
erected at stated intervals of somewhat more than a league, all
along the route. Its breadth scarcely exceeded twenty feet. *41
It was built of heavy flags of freestone, and in some parts, at
least, covered with a bituminous cement, which time has made
harder than the stone itself.
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