The Witley Park estate was owned Victorian Millionaire J. Whitaker Wright and until 2006 was used as a conference centre and now again a private residence.
In the late 1800's Wright had built an underwater smoking/billard room under the illylic lake in his grounds. It is understood he had this built for somewhere for him and his guests to retire too after dinner.
The site is accessed via an underground tunnel from the private estate which opens out into the glass domed room, which is still there to this day.