A million of Man's puny cities piled into one. Gary tried to imagine how big the planet must be to bear such a city, but there was no use of thinking, for there was no answer.

They were dropping down toward one of the fifth tiers of buildings, down and down, closer and closer to the massive blocks of Stone. So close now that their vision was cut off, and the terrace of the tier seemed like a broad, flat plain.

A section of the roof was opening, like a door opening outward into space.

The ship, floating on an even keel, drifted gently downward, toward that yawning trap door. Then they were through the door, with plenty of room to spare, were floating quietly down between walls of delicate pastel hues.

The ship settled with a gentle bump and was still. They had arrived at their destination.

"Well, we're here," said Herb. "I wonder what we're supposed to do.”

As if in answer to his question, the voice came again, the voice that was not a voice, but as if each person were thinking for himself.

It said: "This is a place we have prepared for you. You will find the gravity and the atmosphere and the surroundings natural to yourselves. You will need no space armor, no artificial trappings of any sort. Food is waiting you.”

They stared at one another in amazement.

"I think," said Herb, "that I will like this place. Did you hear that?