The Martian Chronicles.

"The party moved out into the moonlight, silently. They made their way to the outer rim of the dreaming dead city in the light of the racing twin moons. Their shadows, under them, were double shadows. They did not breathe, or seemed not to, perhaps, for several minutes. They were waiting for something to stir in the dead city, some gray form to rise, some ancient ancestral shape to come galloping across the vacant sea bottom on an ancient, armored steed of impossible lineage, of unbelievable derivation."

Remembering the great Ray Bradbury, 1920 -2012.