The Kultaranta or Gullranda Castle ("Golden beach castle") is the summer residence of the President of Finland. The castle is located in the district of Kultaranta on the island of Luonnonmaa, in Naantali. The granite castle is surrounded by 560,000 square metres of park, belonging to the property.
The parks around the castle, containing approximately a thousand square metres of greenhouse and a garden with 3500 roses called Medaljonki ('medallion'), are open to the public. Tours in the garden are organised by the City of Naantali's tourist service.