It Looks Impossibly Thin,

but it is a real building, 

photograph by David Sundberg, it is located at 111 West 57th Street in New York City, a skyscraper that is both the world's skinniest and the second tallest in the Western Hemisphere,

photograph by Evan Joseph, and it is now ready to take in its first residents, the building was designed by SHoP Architects and reached supertall height in 2018 and has a height-to-width ratio of 24:1, making it the world's skinniest skyscraper,

photograph by David Sundberg, the tower accommodates one residence per floor, plus 14 in the adjacent landmarked Steinway building, brining the total to 60, in the building is an 82-foot (25-metre) swimming pool, as well as other luxury amenities including a private dining room and a double-height fitness centre with a terrace, I guess it is a great way to maximise even the smallest of spaces in cities, make the skyscrapers thin!