Presley's ex-wife says it's the spirit of Elvis, and not just music history, that has brought nearly 18 million visitors.
Priscilla Presley recently talked about this month's anniversary of the opening. She told The Associated Press that every time she goes to Graceland, she feels like Elvis is going to come down the stairs any minute.
The King of Rock'n'Roll died in 1977 and the costs of Graceland quickly became a burden.
Accountants wanted to sell the home, but Priscilla Presley thought opening it to tourists could solve the financial problems while keeping Elvis' legacy alive.
Graceland opened for tours on June 7, 1982.