The ground covering of an ice rink

Quick answer：

The ground covering of an ice rink typically consists of a specialized surface made of a layer of ice, which is maintained at a consistent temperature to allow for smooth gliding. This surface is often constructed using refrigeration systems to keep the ice from melting and to ensure its quality. The ice is protected by a layer of waterproofing material and a sub-base made of concrete or another suitable material to distribute the weight of the ice and the skating activities evenly.