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UCBerkeley

http://www.youtube.com/user/UCBerkeley
There are three free chess games that can help you improve your intelligence, you can play a chess game which is simply the best strategy game.

Brain Training|Brain Exercise|Brain Fitness Games|Program

http://www.brainmetrix.com/

Test Your Brain With Brain Teasers and Games | SharpBrains

http://www.sharpbrains.com/teasers/ Below you can find the Top 50 Brain Teasers and Games that our read­ers have enjoyed the most.

mental_floss magazine - Where Knowledge Junkies Get Their Fix

http://mentalfloss.com/ On Fridays, I post a series of unrelated questions meant to spark conversation in the comments.
History

Philosophy

BBC - Languages - Homepage

http://www.bbc.co.uk/languages/ British Broadcasting Corporation Home

Atlas Obscura | Curious and Wondrous Travel Destinations

Final resting place of a pioneering scurvy researcher http://atlasobscura.com/