This rooftop garden on the campus of the University of the District of Columbia includes a variety of vegetation to help absorb excess rainwater and grow food at the same time.
Historians aren't certain what the Hanging Gardens of Babylon looked like: they could have been tiered terraces, built to resemble a mountain or just a really cool rooftop garden.
Well, you see, we took over the office design from an American company that was going to occupy it, and it just so happens that nobody noticed the roof gardens on the plan.
Above the Ikea floors, there's a hostel and even a publicly accessible roof garden where you can come and look out over the city without having to buy a billy bookcase first.