Standing 22 meters tall and with a face covered in thousands of mirrors, Le Cyclop is probably one of the most astonishing works of art in the Île-de-France region. Hidden in the forest of Milly-la-Forêt since the 1990s, this immense head, conceived by Jean Tinguely, attracts thousands of visitors every year who are curious to discover this extraordinary artistic monument.
An extraordinary sculpture just a stone’s throw from Paris
Located in the woods of Milly-la-Forêt, in the Essonne department, this steel behemoth stands nearly 22.5 meters tall and weighs about 350 metric tons. From a distance, it looks like a monumental sculpture. In reality, it’s much more than that: Le Cyclop is also a museum, a maze, and a gigantic artistic machine hidden in the middle of the forest.
The history of the site is almost as fascinating as the artwork itself. It all began in 1969 when Swiss artist Jean Tinguely decided to secretly build this giant head with the help of Niki de Saint Phalle and about fifteen artist friends. For twenty-five years, work on the project progressed quietly in the woods. Everyone contributed their ideas and creations, making the Cyclop a unique collective work in the history of contemporary art.
What immediately catches the eye is its mirror-covered facade, designed by Niki de Saint Phalle. The reflections catch the light and make the giant almost disappear into its surroundings. Depending on the time of day or the season, the Cyclop constantly changes its appearance, blending into the foliage or glistening in the sun.

Inside, once visitors pass through the heavy door, they discover a completely off-the-wall world: improbable staircases, sound sculptures, a miniature theater, metal gears, moving machines, and art installations unfold across several levels. Everywhere, the humor, poetry, and love of upcycling so dear to Tinguely are evident.
The work notably houses a gigantic “Méta-Harmonie,” a machine composed of wheels, motors, and metal balls that gradually set the entire Cyclop in motion. The giant ear sways, the mechanisms spring to life, and the monster suddenly seems to come alive.
For years, the construction took shape out of the public eye, in a spirit of total freedom. The artists worked with salvaged materials, metal parts found here and there, and a healthy dose of imagination.
Less than an hour from Paris, this giant head hidden in the woods remains one of the region’s most unusual day trips. A monumental, strange, and fascinating work of art that you generally don’t forget after seeing it for the first time.