The iconic Round Tower at Windsor Castle will be opened to the public this summer for the first time in 40 years.
Tourists will be able to enjoy views over the rest of the castle, surrounding parkland, and London (on a clear day), as well as St George's Chapel, where Prince Charles and the Duchess of Cornwall celebrated their wedding in 2005.
View over St George's Chapel from the Round Tower. Photo: PA
The top of the Round Tower sits 65.5 metres above the River Thames, and is home to the castle's 15-metre flagpole, which indicates whether the Queen is at home.
If she is, the Royal Standard is flown; if no, the Union Jack flag is displayed.
The tower has been closed for extensive maintenance, and to accommodate Royal Archives.
But it will be open every day in August and September, and the Conquer the Tower tour cost £7 per adult. If the tour is a success, it will start running every year.
Go on, be king of the castle for the day...
Buckingam Palace summer exhibition opening gets record ticket sales as Kate's wedding dress
goes on show
Royal wedding fever boosts tourist revenue from £7m to £41m