Otro, a glow-in-the-dark skate park in France. (Courtesy L’Escaut Architectures)

In the middle of a lightly populated island in the middle of a French reservoir—the Ile de Vassivière—an eerie green glow rises from the crest of a hill at dusk, indicating that you’ve found OTRO, a phosphorescent skate park of sinuous bowls and tunnels. Designed by artist Koo Jeong-A, L’Escaut Architectures, and skateboard consultants Brusk and Barricade, the project is described as “skateable artwork” and located near a large chateau housing the International Center of Art and Landscape, a light house designed by Aldo Rossi, and a humanoid piece of land art only visible from high above.

Check out a photo gallery after the jump.