http://www.staggeringbeauty.com/
I chose this website because I remember when I was in like the beginning of high school or late middle school, this website was really popular and people would reference it a lot. I also just thought that the character in the website was particularly interesting and mysterious as well.
Also if you move your mouse really quickly in the website, the character will start flashing (to the point that your eyes hurt, at least for me) and dramatic music will play out as well.
The website was created in 2012 by George Michael Brower and it because popular when famous YouTubers began including the website in their videos.