How to Trick Google Maps to Get Super Zoom

Ever wish you could zoom in ever farther using Google Maps? Well, with a tiny bit of URL tweaking you can, provided the area you're looking at has big enough images. Check it:

Before Zoom:

After Zoom (Click to Enlarge):
You can see the difference between the above shot of the Googleplex, which is at "maximum zoom," and the super zoomed shot.


Here is the trick:

Select a location and switch to satellite view. Zoom in as far as you can, and click 'link to this page' at the top right. Now replace the 'z' parameter in the URL with a higher value, e.g. 20, 22, or 23, and wait. Some locations will now show more detailed imagery.

Here are some more zoomed images


Here are the links

http://maps.google.com/?ie=UTF8&om=1&z=20&ll=42.359971,-71.055711&spn=0.001334,0.002486&t=h

http://maps.google.com/?ie=UTF8&om=1&z=20&ll=-33.849189,151.211085&spn=0.00075,0.001243&t=h

http://maps.google.com/?ie=UTF8&om=1&z=22&ll=-33.849143,151.211051&spn=0.000187,0.000311&t=h

http://maps.google.com/?ie=UTF8&om=1&z=21&ll=-33.856814,151.2