Human: Please generate a brief description of a foreboding scene outside town ruins with a wall, a river, a stone arch, and bushes. Assistant: 
What appears to be a thick projection of tangled vegetation is in reality the broken base of a wide stone arch that once supported a section of the city wall. A piled mass of blocks at the edge of the river, crowded over with a thick growth of bushes and trees, bear mute testimony of the massive structure that once spanned the width of the water.