Take the cheapest boat your city has, just to look back at it

Every city with water sells some kind of cheap crossing — a commuter ferry, a water taxi, a rowboat by the hour on the park lake. Take the cheapest one going, not to get anywhere, but to turn around: your own skyline from the water is an angle no street can give you. The regulars on board have seen it ten thousand times and stopped looking, which means the view is all yours.