Me and Keelin just made a stencil of the Edinburgh skyline from Princes Street. I was really pleased with it, and will definitely use sponging again. The whole thing only took about 4 hours.
Here's the original panorama. I cut out the boring trees in the middle. The contrast on the castle wasn't great, so I ended up splicing in a separate image: Desaturate, boost contrast, find edges, print: Cut out! Stencil Ready: Sponge acrylic paint onto wall: Stencil done!