Ever wondered how the internet looks like, 10 years ago?
Back then, flash animation, video streaming, or even audio files weren't that common on web pages. Portals belongs to limited numbers of companies or organization. CMS and Blogs, a concept nobody could think of.
The WaybackMachine collect, manage, and archive website versions form all over the world.
See how your favorite website looks like, years ago.
Ex. see google in its prototype or yahoo in the 90's.
Look at the original Netscape, and so much more.
Go check it out. It's fun. :D