In commemoration of its 60th anniversary, Holiday Inn will be placing real diamonds under a few lucky guests' pillows.

The Hotel Chain will be placing nearly $40,000 worth of diamonds under pillows for its diamond campaign starting October 1. The campaign will be done exclusively in Europe and Holiday Inn parent's company IHG had arranged digital and mobile clues for customers as to where the diamonds are located.

Guests who check in from Monday October 1 will have a chance of finding the sparkling gem. Guests can follow www.facebook.com/holidayinn for clues and hints about where the diamonds are located.

Mike Greenup, vice president marketing Europe, IHG, said to ITCM Magazine, "Since opening our first hotel in Memphis in 1952 we're incredibly proud  to have provided 60 years of great service around the world. Hiding diamonds in Holiday Inn hotels is an innovative way to celebrate our anniversary and give something back to our guests. It will be a big surprise for one lucky person in the UK when they check into their bedroom and find the rock sitting under their pillow!"

Since their first opening in Memphis, the hotel chain has grown to 3,375 hotels globally with different brands including the Holiday Inn, Holday Inn Resorts, Holiday Inn Express and Holiday Inn Club Vacations.

Holiday Inn was the first hotel room to introduce TVs in hotel room and telephones. It was also the first hotel chain to allow kids to stay and eat for free as well as the first to do online bookings.