Hyderabad, June 19 -- A royal mystery is silently waiting inside one of Sydney's most famous buildings. Queen Elizabeth II wrote a secret letter many years ago, but the world cannot read it yet. The letter is locked safely in Australia and can be opened only in the year 2085.

This unusual message has created curiosity among royal fans across the world. What did the Queen write? Why should people wait for nearly 100 years to read it? Nobody knows the answer yet.

Where Is Queen Elizabeth II's Secret Letter Kept?

The secret letter is kept inside the historic Queen Victoria Building in Sydney, Australia. The building is a popular landmark and was named after Queen Victoria, who was Queen Elizabeth II's great-grandmother.

The letter is pla...