The world is full of information, much more than can be captured in this ~TiddlyWiki and its Cosmography section, and elsewhere.. See also ontologies
There are many people who have made great efforts to make a lot of information readily available in an organized fashion (data), and also to make sense of it (knowledge), for example by visualizing it.
United Nations Statistics Division
Gapminder Hans Rosling website
https://twitter.com/explorables
http://bionumbers.hms.harvard.edu/
Main portal for all of Wikipedia content: https://en.wikipedia.org/wiki/Portal:Contents
A nice categorization: Wiki Category:Fundamental categories (now deleted, now see here, here, and here). seems to be back https://sco.wikipedia.org/wiki/Category:Fundamental_categories
https://en.wikipedia.org/wiki/Category:Main_topic_classifications
Wiki Portal:Contents/Portals https://www.wikiwand.com/en/Portal:Contents/Lists
https://en.wikipedia.org/wiki/Category:Indexes_of_topics
https://en.wikipedia.org/wiki/User:West.andrew.g/Popular_pages http://wikitop.alwaysdata.net/wikitop_en_portal.html
Wiki Portal:Contents/Reference
Dictionaries, for instance: https://en.wiktionary.org/wiki/Wiktionary:Main_Page
https://en.wikipedia.org/wiki/Category:Main_topic_classifications
https://en.wikipedia.org/wiki/Special:AllPages
http://nptel.ac.in/course.php?disciplineId=111
TW, https://github.com/ether/etherpad-lite, http://kune.cc/
Collections of technical books: https://www.safaribooksonline.com/learn/
Libgen, sci-hub.io, bookzz . org
https://www.reddit.com/r/Scholar/comments/3bs1rm/meta_the_libgenscihub_thread_howtos_updates_and/
hmm http://aaaaarg.fail/collection/list
http://luke.deentaylor.com/wikipedia/
AI
Search ebooks: https://cse.google.com/cse/publicurl?cx=003753031376654422446:szjag5vbefo