There are some special works of Google, that are known but to a select community of people. They are the  special  or hidden or lesser known of the Google pages, and are worth having a look at. Check them out !

Special Hidden Google Pages

Google Moms
Rare Google Beta Logo and Google Holiday Logo’s
Google’s Metaplex
Google Heart 1 & Google Heart 2
Google Doodles

UncleSam, Microsoft, Mac, Linux, BSD.
Google’s Help To Build Better Query
Google’s Languages Which Only Google Can Understand

More “un-understandable’s” ! Bork, Bork, Bork!, thlngan Hol, H4×0r, lgpay Atinlay.

Google Easter Feature
Google Gulp.

These posts are sure to interest you too:

1. Google Fun Search Tricks
2. Revolving Google, Uneven Google or Toogle
   
3. Google in reverse: com.google.

Know of any more? Do share!

Take a look at some cool hidden YouTube Easter Eggs too.