Where does the door go? - Telstra Building, Launceston

The Telstra and Myer buildings are the tallest in Launceston.  I took these photographs showing the rear of the Telstra Exchange building.  I am always intrigued by the door on the top floor that goes to nowhere, well just a massive drop to the ground!

Design wise the building uses large panels of finely crushed stone, I like how the bonding material between the panels shows, creating distinctive vertical patterns.  On sunny days and caught in the right light, the stones shimmer.