The Prince of Wales visited Worcestershire and Shropshire on Monday.
He officially restarted the fountain at Witley Court near Worcester more than 60 years after the stately home was destroyed by fire.
The fountain has undergone major refurbishment as part of a long-term programme restoring the historic gardens and landscapes around the listed ruins of the house.
The Perseus and Andromeda Fountain features a main block rising to a height of 26ft and is made of a single block of stone.
The fountain, which has 120 jets, has undergone a £700,000 restoration.
The central jet of water reaches up to 90ft high.
The Prince then visited Shropshire where he opened the Jubilee Stand at Ludlow Racecourse.
Prince Charles was originally due to open the stand late last year but the ceremony was postponed when his helicopter was turned back because of heavy fog.