Outdoor sculptures that change color with temperature are a fascinating intersection of art and science. These installations use thermochromic materials, which react to heat variations, creating dynamic visual experiences. Here are some of the most famous examples:

1. "Cloud Gate" (The Bean) - Chicago, USA

Anish Kapoor's iconic sculpture features a polished surface that reflects its surroundings, but its stainless steel also subtly shifts in hue with temperature changes, especially in extreme weather.

2. "Thermochromic Skyline" - Rotterdam, Netherlands

This public art piece by Studio Roosegaarde uses heat-sensitive pigments to transform its appearance based on ambient temperature, blending urban art with environmental interaction.

3. "Chromatic Fields" - London, UK

A series of interactive sculptures by Jason Bruges Studio that employ thermochromic paint, revealing hidden patterns as temperatures fluctuate throughout the day.

4. "Solar Iris" - Barcelona, Spain

Designed by architect Enric Ruiz-Geli, this kinetic sculpture incorporates thermochromic glass panels that shift from transparent to opaque, responding to sunlight intensity.

5. "Heat Wave" - Melbourne, Australia

A large-scale installation by artist Lynette Wallworth, featuring temperature-sensitive tiles that create a mesmerizing color gradient as the day warms and cools.

These sculptures not only captivate viewers but also highlight the innovative use of materials in public art. Whether through reflective metals or advanced pigments, they remind us of the ever-changing relationship between art and nature.