Buoys would work.
Dreams in Blue
Each year these blossoming blue fields attract thousands of tourists. Hitachi Park is located in the Ibaraki Prefecture on Honsyu in Japan. Its a beautiful spectacle during the flowering of the nemophila. Nemophilas are annual flowers. The word is a combination of the Greek words “nemos” (small forest) and “phileo” (love). The Japanese word “hitachi” translates to dawn. Taken together: “small forest love in dawn.” A blue heaven on Earth.
Baptiste Debombourg - Flow
Light Art by BRUCE MUNRO
C-V. Hølmebakk - Sohlbergplassen Viewpoint