In 1999 The Blair Witch Project became a multimillion-dollar box-office sensation. Much of this success owed to a clever marketing scheme centering around a website, blairwitch.com.

The premise of the site (and the movie) was that in 1994 three student filmmakers had disappeared in the woods near Burkitsville, Maryland while shooting a documentary about the local legend of the Blair Witch. Supposedly the Blair Witch was Elly Kedward, a woman who had been accused of witchcraft and child murder back in 1785 and had been banished from the town, left to die of cold in the woods. Her spirit was said to still haunt the area.

Visitors to blairwitch.com could view detailed historical information about the legend of the Blair Witch, including old photographs, police reports, letters, and interviews with officials. It was all so convincing that many people were fooled into believing that Elly Kedward was a real historical figure, and that there really was a legend of a Blair Witch. There wasn't. The entire tale was fictitious.

The site revolutionized internet marketing. Movie studios started churning out hoax websites to accompany their movies, in the hope of generating the same kind of buzz that the Blair Witch Project enjoyed. But none of these efforts has yet matched the success of BlairWitch.com.