Art installations on water refer to artistic creations that are placed on or around bodies of water, such as lakes, rivers, or oceans. These installations can range from temporary sculptures to permanent works of art. They often serve to blend art with nature, create unique viewing experiences, and sometimes address environmental or social issues. Some famous examples include Christo and Jeanne-Claude's 'The Gates' in Central Park and Yayoi Kusama's 'Infinity Rooms' in various locations.