At 45,000 square feet, Extell Development Company’s One Manhattan Square is home to the largest private garden in the world. Designed by West 8 Urban Design and Landscape Architecture, the sprawling outdoor space boasts topiary and birch gardens, a Sumac Meander, courtyards, a children’s playground, relaxation spaces, a stargazing observatory, a covered dog run, an adult treehouse, a tea pavilion, fire pits, and alfresco dining space. The gardens account for just a portion of the 100,000 square feet of amenities residents of the building’s Lower East Side condos can enjoy, however; the tower is also home to a state-of-the-art gym, an indoor swimming pool, basketball and squash courts, a bowling alley, a golf simulator, a children’s playroom, a culinary lounge, a game room, a wine room, a cigar room, and a performance and theater space.