Outdoor sculptures that harness natural light create mesmerizing interactions between art and environment. Here are some of the most famous examples:

1. Cloud Gate (Chicago, USA) - Nicknamed "The Bean," this mirrored sculpture by Anish Kapoor reflects sunlight and sky, transforming with the day's light.

2. Solar Tree (Vienna, Austria) - Designed by Ross Lovegrove, this sculpture integrates solar panels, absorbing sunlight to power its LED illumination at night.

3. Sky Mirror (Various Locations) - Another Kapoor masterpiece, this concave mirror captures and reflects sunlight, creating stunning optical illusions.

4. Lightning Field (New Mexico, USA) - Walter De Maria's installation of 400 steel poles interacts with sunlight and lightning, creating dramatic light plays.

5. Sun Tunnels (Utah, USA) - Nancy Holt's concrete tunnels align with solstices, framing sunlight in precise patterns during specific times of year.

These sculptures demonstrate how artists use sunlight as a dynamic medium, creating ever-changing artworks that evolve with nature's rhythms.