Before revision: The idea of a grotto was originally a means to enhance a dank undercroft, or provide an antechamber before a piano nobile, but later became a garden feature independent of the house .
After revision: it, sometimes on the edge of a lake, with water flowing through itThe idea of a grotto was originally a means to enhance a dank undercroft, or provide an antechamber before a piano nobile, but later became a garden feature independent of the house .