The connotation of the words "overgrown" and "towering" primarily contributes to the image of an old and untouched place. "Overgrown" implies neglect and wildness, while "towering" suggests something that has risen up significantly, potentially without care. Together, these words evoke a sense of a place that has not been maintained and has been left to the passage of time.
Therefore, the best response is:
They create the image of an old and untouched place.