Imagine a giant high-tech plant where people ski on the roof and climbers scale the walls. This is CopenHill (also known as Amager Bakke) — a unique architectural masterpiece located in Copenhagen. This facility in Denmark has become a symbol of modern ecological thought, combining a waste-to-energy plant and an outdoor activity center under one roof.

The 85-meter-high building was designed by the world-renowned firm Bjarke Ingels Group (BIG). Its facade is clad in aluminum bricks that create a futuristic appearance and change hue depending on the lighting. Architect Bjarke Ingels calls the project an example of "hedonistic sustainability" — proof that environmental responsibility can bring pleasure and joy to city residents.
In addition to its recreational functions, the complex is a powerful energy hub. Every year, it processes up to 560,000 tons of waste, providing heat and electricity to approximately 150,000 households. It is one of the cleanest facilities of its kind in the world, where virtually pure water vapor is released from the chimney instead of toxic smoke.