The Great Khan has dreamed of a city; he describes it to Marco Polo.

“The harbor faces north, in shadow. The docks are high over the black water, which slams against the retaining walls; stone steps descend, made slippery by seaweed. Boats smeared with tar are tied up, waiting for the departing passengers lingers on the quay to bid their families farewell. The farewells take place in silence, but with tears. It is cold; all wear shawls over their heads. A shout from the boatman puts a stop to the delays; the traveler huddles at the prow, moves off looking toward the group of those remaining behind; from the shore his features can no longer be discerned; the boat draws up beside a vessel riding at anchor; on the ladder a diminished form climbs up, vanishes; the rusted chain is herd being raised, scraping against the hawsepipe. The people remaining behind look over the ramparts above the rocks of the pier, their eyes following the ship until it rounds the cape; for the last time they wave a white rag.
“Set out, explore every coast, and seek this city,” the Khan says to Marco. “Then come back and tell me if my dream corresponds to reality.”

“Forgive me, my lord, there is no doubt that sooner or later I shall set sail from that dock,” Marco says, “but I shall not come back to tell you about it. The city exists and it has a simple secret: it knows only departures and not returns.”

If you choose to believe me, good. Now I will tell how Octavia, the spider-web city, is made. There is a precipice between two steep mountains: the city is over the void, bound to the two crests with ropes and chains and catwalks. You walk oon the little wooden ties, careful not to set your foot in the open spaces, or you cling to the hempen strands. Below there is nothing for hundreds and hundreds of feet: a few clouds glide past; farther down you can glimpse that chasm’s bed.

This is the foundation of the city: a net which serves as passage and as support. All the rest, instead of rising up, is hung below: rope ladders, hammocks, houses made like sacks, clothes hangers, terraces like gondolas, skins of water, gas jets, spits, baskets on strings, dumb-waiters, showers, trapezes and rings for children’s games, cable cars, chandeliers, pots with trailing plants.

Suspended over the abyss, the life of Octavia’s inhabitants is less uncertain than in other cities. They know the net will only last so long.