Did you Ever Checked Google Sitemap.xml and Sitemap.html?

Google Sitemap.html and Sitemap.xml 

Sitemap is the detailed description of your website links. Basically Sitemap is of two types

(1) Notepad Sitemap
(2) XML Sitemap

Many website using the concepts of sitemap. Google.com also have sitemap.xml file and sitemap.html file.

Where is Google.com Notepad Sitemap?

Google notepad sitemap is here www.google.com/sitemap.html (Simple easy to use and understand)

Where is Google.com XML Sitemap?

Google xml sitemap is here www.google.com/sitemap.xml (Big file may hang your PC)