I had occasion somewhat recently to visit the top floor of the Central Chambers building, the offices of Shaw Communications. The view from there is quite impressive.
The biggest surprise from this vantage point was the tower on top of the Central Post Office building:
Even though the elevator penthouse is mentioned in this Urbsite post, it always blended into the background for me.
Also visible are two towers on top of the Langevin Block, the uppermost corner of Confederation Square, the Sakahan tarp over the National Gallery, and Gatineau. And, of course, Parliament Hill, both the Centre Block (plus Peace Tower) and East Block.
[Look for more one-photo posts under the label Singles]