City dwellers are reportedly 40 percent more likely to develop mood disorders than people in rural areas. But walking for roughly 90 minutes in nature, according to a Stanford University study published in June, can calm the negative thoughts. The Essence Skyscraper is designed to provide urbanites with just such an experience. The 2,067-foot tower, envisioned by a Polish architectural team, won a 2015 skyscraper competition to redefine high-rises. Within the imagined 3.6 million square feet, visitors cross 11 distinct ecosystems from around the world. "We wanted something that would blend into an urban fabric," says team member Jakub Pudo, "something that would allow us to go inside and get lost."