Content to let his people drink before him, Khan sat down upon a flat-topped boulder safely clear of the nearest geyser.

In one lot - called "the Haunted," we never asked why - there was a flat-topped boulder almost two stories high.

Their campsite had three tents arranged around a tall, flat-topped boulder that stood alone at the locus of a great circle of tundra.

Staring down at them from a flat-topped boulder is a small furry mammal.

Then he saw the flat-topped boulder ten yards down the hill and halted so suddenly that Matt almost bumped into him.

Midway in the arc of his vision was a ledge, ending in a flat-topped boulder.

Searching for a way to proceed, he saw a flat-topped boulder whose edge he could reach with his fingers.

"I do not think that wise," came a third voice and both men swung to see a grey-haired man sitting cross-legged on a flat-topped boulder.

They sat at the edge of shade under the Sphinx's outflung wing, using a low, flat-topped boulder as their table.

Behind the two contestants sat two large, flat-topped boulders, positioned about two meters apart.