The universal clock is a big complex ubicated inside temporal tower.
The only way to enter this clockwork is to bring Dialga (or its soul) into the final floors of Temporal Tower. A passageway located there will open revelating the entrance.
This place itself is always moving, working with other parts as a really big system. The Clock can also take out intruders by using various defense systems. No living creature lives here.If this clock were destroyed ir stopped, time will also stop in the entire universe.