Powers of Ten
This movie was made for IBM almost 30 years ago, and it's still amazing.
For a new-millennium, partial (100 to 1,000,000 meters), interactive version - try this Google Maps version.
And for an even more space-age, larger (10 to 10,000,000 meters), more interactive version - use this Google Earth file (with Google Earth application.)
(Note: For the Google Earth file you'll probably have to right-click or control-click the link and choose "Save File". If the file is downloaded and the name ends with .txt - delete the .txt.)
Looks like the location has changed only a little since 1977. Top Men think some kind of Powers of Ten marker or monument would be appropriate. (The closest Geocache is here.)
UPDATE (12/6): Slight correction - Powers of Ten was made for IBM by Charles and Ray Eames. (Thanks Tinselman!)