1. Bosco Verticale Via inhabitat.com This rendering by architect Stefano Boeri features the first urban vertical forest, Bosco Verticale in Milan. The pair of apartment skyscrapers are built to sustain the equivalent of 2.5 acres of forest extending towards the sky. treehugger.com The soon-to-be-completed towers feature cantilevered balconies, wind and solar systems, and greywater recycling systems that irrigate the 5,000 shrubs, 480 big and medium size trees, 250 small size trees, and 11,000 ground-cover plants chosen for the project. 2. The "Tower Flower" Paul Raftery The "Tower Flower," designed and built by architect Edouard Francois in Paris's 17th arrondissement, contains 380 giant concrete flower pots embedded in each of the apartment building's balconies. 3. A (literal) Tower of Flowers Via underage-thinking.tumblr.com 4. The Stairscraper: "A Desert Green" Via designboom.com The "Stairscraper" was a winning design by Barcelona-based architect Nabito in the Total Housing Competition. The "horizontal landscape city," reportedly scheduled for completion in Abu Dhabi in 2015, will allow each apartment to have its own balcony and roof garden. 5. Living Wall at the Birmingham NEC Via bluestemnursery.blogspot.com This wall at the LG Arena in Birmingham features a "compost modular system" built into a steel sub structure. Check out the full project gallery created by the UK's "preeminent supplier of Living Walls." 6. Living Wall at Westfield Shopping Centre Via scotscapelivingwalls.net This living wall in Shepherds Bush is the largest "Living Wall" in Europe. It features a fully automatic zoned irrigation and rainwater harvesting system. 7. Cascading Water Garden Via scotscapelivingwalls.net A private London residence designed by Biotecture Ltd. and maintained by Scotscape 8. Edgware Road Installation Via scotscapelivingwalls.net This living wall at Edgware Road tube station is an experimental installation measuring how efficiently such walls reduce PM10s (particulate matter) from the atmosphere, which is a respiratory hazard. 9. Hydroponic Interior Wall Via scotscapelivingwalls.net Designed by Biotecture Ltd. for an office in Norway 10. Phyto Universe Via verticalgardenpatrickblanc.com The Phyto Universe hair-care center on Lexington Avenue was New York's first vertical garden. Created in 2006 by Patrick Blanc, a scientist from the Centre National de la Recherche Scientifique and Engineer Laurent Corradi, the garden covers 2,900 square feet and includes 9,000 species. Via luxist.com 11. Le Mur Vegetal at the Musée du quai Branly Via verticalgardenpatrickblanc.com Le Mur Vegetal (or "Vertical Garden") by Patrick Blanc in Paris. Blanc is known as the father of the vertical garden, through which he combines artistry and botany to accomplish astonishing transformations of urban spaces. 12. The Pont Max Juvénal Overpass Via bluestemnursery.blogspot.com Designed by Patrick Blanc in Aix-en-Provence, France (2008) For contrast... Via urbantimes.co 13. Madrid Caixa Forum Via brisbane.concreteplayground.com.au This Patrick Blanc-designed vertical garden on an exterior wall of a former power station features 15,000 plants and 250 different species. 14. Living Walls in the Netherlands Via brisbane.concreteplayground.com.au These living walls (also designed by Patrick Blanc) are covered in felt and rock wool, which helps irrigate the embedded plant life. 15. Recycled Bottle Herb Garden Via inhabitat.com Recycled bottles filled with soil and herbs provide a functional herb garden at a family home in Sao Paulo. Designed by Rosenbaum. 16. Hanging Desert Garden Via rioabajorio.tumblr.com At the organic medicinal herb farm Rio Abajo RIo, in Abiquiu, New Mexico. 17. Modular Tetris Garden Via myverticalgarden.tumblr.com Modular garden tiles produced by Spanish company Ceracasa can be configured in an infinite number of patterns. 18. Chimney Garden Via blogs.vancouversun.com Designed by Mike Weinmaster at a luxury condo building in Vancouver. 19. A Sears Swathed in Green Via blogs.vancouversun.com Designed by Mike Weinmaster in Vancouver. 20. The Semiahmoo Library Designed by Mike Weinmaster in Surrey. Via greenovergrey.com 21. An Alternative "Greenhouse" Via databerries.tumblr.com Unlike traditional "greenhouses," these houses are covered by (rather than filled with) plant life. 22. Via belleinterior.com A contemporary private residence was designed by the Belgian architects Samyn and Partners and their botanical specialist, Patrick White. 23. "Green Cast" Plantered Façade Via kkaa.co.jp This Japanese structure designed by Kengo Kuma and Associates is covered in slanted planters made out of aluminum cast from decayed styrene foam. 24. Villa Cascais Via verticalgardendesign.com A vertical garden designed by landscape architecture firm Proap at a villa in Lisbon, Portugal. 25. Florafelt Pocket Garden Via plantsonwalls.com Constructed using the florafelt planters produced by "Plants On Walls" 26. Singaporean Office Garden Via somme.tumblr.com An award-winning interior garden created by Tierra Design / POD for a building in Singapore's Central Business District. 27. Succulent Collages Via undermatic.tumblr.com 28. Via gardendancing.blogspot.com 29. Via pinterest.com 30. Via woseph.tumblr.com 31. A Patio of Pots Via resimhayattir.com 32. Vertical Veggie Garden Via unconsumption.tumblr.com 33. Evergreen Indoor Herb Garden Via the-more-u-know.tumblr.com 34. Ascending Hotel Horticulture Via greenovergrey.com Designed by the Canadian firm Green Over Grey Living Walls and Design 35. San Vicente de Raspeig Children's Library Via mymodernmet.com Designed by architect Jose Maria Chofre 36. "Gardens by the Bay" Via pinterest.com Created by Wilkinson Eyre Architects for the National Parks Board of Singapore 37. The "Urban Cactus" Via inhabitat.com The Urban Cactus is an architectural project in Rotterdam created by UCX Architects, and includes 98 residential units on 19 floors with staggered balcony gardens. 38. Aquapura Hotel Via doverdesignuk.tumblr.com Designed by Rebelo de Andrade in Lisbon, Portugal. 39. Gravity-Defying Bike Path Via Flickr: kenmccown An exterior wall at a restaurant in Mexico City.