Most spectacular photography... ever?
flickr.com
flickr.com
What's most impressive is that -- at least with his Eiffel tower panorama, and, presumably, others as well -- there is no super-fisheye lens used. It's a massive montage that he took and worked on over two days.
Read the descriptions in the photos, and be very impressed.
Also, if you scroll down to the comments section, he has provided links to more of his favorite photos for quick and easy browsing.