*Wild Eagle's view of the Smokies, easily. And while it may be the weaker of the two sides, the right also gives you a great view of the coaster side of Dollywood.
*Top Thrill Dragster has the best view at Cedar Point, even for just a bit.
*Power Tower at sunset is beautiful too if you face out towards Maverick/Mean Streak.
*On Intimidator you can see Charlotte's skyline as well as a lot of the surrounding Carolina countryside.
*Turn your head on Milennium Force at night and the front of the park is absolutely stunning. I rode it during a harvest moon and it was absolutely gorgeous.
*The Beast's second lift at night gives you a great view of the twinkling lights of Eiffel Tower.
*And I hate to fanboy a over Cedar Point like this, but ride GateKeeper on the left and turn your head out to the lake. That's a great view, especially in the morning when it's still foggy.