Dwelling in the Past

A vast desert stretches far as the eye could see.
Sand, ruins of buildings past, eroded robots,
abandoned mining equipment, occupied this once
fertile land thriving with life.  Years ago the robots
worked for a mighty dragon, a jolly old dragon who grew ill
as time passed.  His remains located in the center of a mighty gorge.
Further in this wasteland was once a living harbor.
A Skipper with his crew sailed a vast sea filled with water.
They too have eroded with the decaying land.
However, one can relive to experience this desert
in its former glory.  Scattered throughout are purplish
stones that distort time, reliving the past.
If they hit the stone the miracle occurs.
Life grows once more, the sand becomes fertile,
the buildings devoid of age, the robots spark with life,
mining equipment that actually works.  Yet the stones can
only do so much, their area of effect isn't vast enough to cover
the entire desert.  If another strikes another stone, the effect disappears
from one area to the other.  What good is the miracle?
The past is gone and the wasteland returns.  Time is cruel.
Dwelling in the past won't bring it back.  It will remain a desert.