The filmmakers are from a company called Timescapes, which has developed a custom motion rig attached to a Canon 5DmkII to capture these shots. Here are some behind-the-scenes vids of how they do it:

youtube.com/watch?v=AoCx6sOCTQE
youtube.com/watch?v=Nxvx_LOnGhw
youtube.com/watch?v=sVzFm_NDhyE
youtube.com/watch?v=JGLSFSjyffU

If you’re really into it, you can download a full 1080p version on the Vimeo page.

[via @philipbloom]