Here's an amazing way to get the lay of the land in London. Photographer Jeffrey Martin has stitched together 7,886 high-res images, creating an 80 gigapixel (or 80 billion pixel) panoramic photograph of England's great capital. The photo is also interactive, which means you can play aerial tourist. When you enter the site, click on "Show Landmarks" (lower left corner), make a selection, and then start flying around the city.
These photos were taken from a 36 floor building, using a DSLR camera and a 400mm lens. And it now stands as the world's largest 360 photo.