The sun had just gone down behind the mountains to the west.
It was eight o'clock, and the sun had gone behind the mountains.
The sun had set behind the mountains, but it was not yet dark.
The sun sat low behind the mountains to the west, half of a glowing red ball.
She leaves behind the mountains and the country life to move to Madrid.
He wondered who lived behind the mountains and what it looked like there.
With the sun now behind the far mountains the air had become suddenly chill.
Shadows grew longer as the sun began to go down behind the mountains.
The sun was still behind the mountains, but it would rise soon enough.
The group arrived just as the sun slid behind the western mountains.