Here are some cool websites to blow your mind..
try at your own risk. :)

1. Gigapan –  45 GigaPixel Image of Dubai, you can zoom forever.
2. 1 Billion Facebook Profile Pics on a Page – Keep Exploring.
3. typedrummer.com – Make your letters beat
4. Crazy Card Trick – Play this magic game and feel OMG.
5. Twitter Clock – A clock made from twitter
6. Geo Guesser – Guess places of the world . Cool tool for geography geeks.
7. Stranger MeetUp– Chat with complete strangers across the world anonymously.
8. Findtheinvisiblecow.com – Find the invisible cow on the page by focusing on the audio.
9. WikiPedia Vision – See live edits happening on wikipedia on Map.
10. famousobjectsfromclassicmovies.com – Cool game for movie addicts.
11. YouTube Map Explorer – Explore Youtube on a Google Map
12. You are Getting Old – Interesting stats about your age.
13. Chill the lion – Cool CSS experiment
14. LapFace – Live community of people working on laptops
15. Map Chat – Location based chat on a Map
16. Asciii Camera – Turn your webcam into ASCII Camera
17. WebCam Toy – Pretty cool webcam effects on your pic
18. antipodr.com – Find what is on exactly opposite side of any place on earth.
19. Face Recognizer – How well You can recognize Faces (I scored 8/10)
20. Catsdestroychrome – Infinite Random Cat Pictures
21. Gravity is fun – Click anywhere to create a mass. Click near to it and the two will attract each other and merge to form a single mass and go on having fun with gravity.
22. Pixelthoughts – An interesting 60 seconds mediation for you
23. Stars – The whole galaxy put on your browser
24. Clickhole – A BuzzFeed parody website
25. Windows 93 – Get nostalgic and use old windows on your browser
26. weavesilk – Unleash your art or draw any shape here
27. 404 Not Found – Interesting 404 error page by the server itself.
28. blitzortung – Live Lightening happening across the world on a map.
29. geocitiesizer – Make any website look like amateurishly made in 90’s.
30. fff.cmiscm – Full timepass without any motive at all
31. Name Age Calculator – Find how much old your name is
32. nyctaxi.herokuapp.com –  A Day in the life of NYC Taxi
33. urinalman – real life situation you face everyday turn into a game
34. zoomquilt.org  – Go on your endless zoom journey. Meaningless but interesting.
35. PointerPointer – Move your mouse on the page and keep there for a second. A random pic pointing your cursor will be there to tickle you. Cool time pass and fun site to hang out with.
36. One Tiny Hand – A site having collection of Pics of celebritoes with a photoshopped one tiny hand. Looks simple but its fun to browse those celeb photo shopped images. Believe me.
37. World Cam – Pulls out Instagram photos from the location you choose. Very useful if you are missing a place. Watch out other people snaps to revive yourself.
38. Lame Book –  A collection of weird and funny things posted on facebook with the user identities blurred.
39. 9 eyes – Interesting Google street views Pictures
40. 9Gag – 99% chances are there that you know this website. But still completes the list completely.

Source: http://merabheja.com/