Foreground – “stands” wood on concrete seating.
Boards surrounding ice surface with glass on top.
On ice – Zamboni about to go off ice through raised door. Door opens higher. 
Opposite side – 2 team benches with penalty box in between.
This machine shaves the ice, collects the snow, and lays down a film of water which freezes quickly creating a smooth surface

NHL arena 
Seating for 16 to 20,000 fans. 
Note ceiling hung time clock/score board. Able to show replays, ads etc. 
Note team bench on near side boards. Other team bench to right not in picture. 
On far side boards a penalty box for each team with time keeper enclosed space in between 
This is the view from less expensive seats.