Bosco Verticale (Italy) - Completed in 2014 - Height: 111 meters

Detail: Located in Milan, the Bosco Verticale, or "Vertical Forest," is a pair of residential towers with a lush, vertical garden on each balcony, enhancing urban biodiversity.

Interesting Fact: The towers host over 900 trees, 5,000 shrubs, and 11,000 perennial plants.