154 Flights of Stairs Straight Out of Escher Drawing [via Nina Reznick]

“Vessel,” as it is currently called, will offer the public a mile of climbable space inside a 15-story steel frame. The "public landmark" will have 154 winding flights of stairs, including nearly 2,500 steps and 80 landings, he explained. Its base will measure 50 feet in diameter before widening to 150 feet at the top.

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