(30 Mar 2014, 7:28 pm)Dan wrote Dean Bridge can be a good one to go too, depending on light. 'Tis a little further out though.
Obviously you've got The Mound and the other bridges near Princes Street too.
George Street is a good one for another spot near Princes St - as long as you keep your eye on the statue of George VI!
Also near Princes St is Leith Street. There's a bridge which allows you to cross the road, and it leads into the shopping mall. Good for the "birds eye view" shots.
Horse Wynd (Holywood terminus) in Edinburgh is good too, and you'll find that near the 35 route (if you're travelling that way to Ocean Terminal, that is!)
The top of Leith Walk is good right now because you've got some flowers blossoming. Can make for some marvellously composed shots.
I'm a fan of the Clerwood terminus, and Riccarton is nice too. Mayfield terminus is stunning.
Northfield Broadway is a good place for mid-route shots, and it would give you the opportunity to have a ride of a Solo SR of Lothian's too. I had a round trip of the 69 after visiting Marine Depot - a pleasant journey, and it was great how everyone seemed to know each other (with many greeting the driver personally!)
Probably just be Edinburgh Princes St/Waverley Bridge for me, sadly.