Designed by British landscape architect Kim Wilkieto, the Green Wall at Longwood Gardens in Kennett Square, PA was built to resemble a lush, green jungle. At 4,200 square feet, it is the largest “green wall” in North America. The wall contains 47,000 plants, provides oxygen, and cleans dust from the air. The Green Wall houses seventeen award-winning bathrooms. In fact, the bathrooms hold the 2014 title of “America’s Best Restroom”.