Circle as a shape carries the most symbolism of all shapes. It presents wholeness, eternity, infinity, timelessness. So, it is more than obvious that all of these symbolic meanings will inspire architects and designers. As you can see on the pictures here, the designs are complete packages of the objects which are surrounded with relaxing greenery and water. All of them immediately share the energy and the positive vibrations. Thus, why not make more of these designs and construct them more often?