The public can also access the Spheres, which are located at 2101 7th Avenue in Seattle, as part of the Amazon HQ tours.
Amazon founder and CEO, Jeff Bezos, officially opened the project on 29 January 2018, by giving a voice command to the company's digital assistant, Alexa.
Amazon expects to announce a decision later this year on "HQ2", which will be equal to its Seattle headquarters, and is asking the finalists to refine their pitches. All three units share an open-plan indoor area that is filled with thousands of plants, which can be viewed from multiple vantage points.
The largest of the three joined spheres is over 90 feet (27 meters) tall and 130 foot (39 meters) in diameter.
Amazon says the sound of water running through the building and the smell of blossoming flowers will inspire "creativity" and perhaps even improve brain function citing studies linking increased productivity to more natural environments. If that's the case, Amazon's new office space is flawless to boost the performance of the employees.
Other offices that are designed around plants include Italian furniture manufacturer Cassina's headquarters in northern Italy by Patricia Urquiola, the all-female co-working club The Wing in New York City, and co-working spaces by Sella Concept in east London. Numerous plants inside The Spheres are from cloud forest ecosystems, where plants thrive on mountainsides at an altitude ranging from 3,000 to 10,000 feet. Inside, it's warm and humid, with temperatures sitting at an average of 72 degrees Fahrenheit and 60 percent humidity.
"We wanted to create something really special, something iconic for our campus and for the city of Seattle", John Schoettler, Amazon's vice president of global real estate and facilities, said.
The e-retailer opened its first supermarket with no checkout or self-service machines earlier this month.
Non-Instagram photography is by Amazon.