When the designs for the Eiffel Tower were completed, Eiffel had included plans for a roughly 1,000-square-foot dwelling - exclusively for his own private access - to be built on its very top floor. Located just below the tip of the spire with the platform below it open to accommodate public visitors, much of the available space was taken up by technical installations, the elevator shaft, and the landing from the stairwell used to access the apartment from the floor below. Still, it boasted enough space to include a kitchen, a bathroom, and a living room - with a table, a couch, and even a piano. It had no bedroom, so presumably the famed engineer never actually slept there. Instead, he mainly used his private quarters as a place to conduct scientific research and experiments as well as entertain notable guests - one of the most celebrated being the famous American inventor Thomas Edison.

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