Never knew this existed! 16th Avenue Mosaic Staircase, San Francisco, CA. There are 163 mosaic panels—one for each step—that make up this staircase. The panels begin depicting the ocean and, by the time you reach the highest step, you’re in the sky with the birds.
Palazzo dello Spagnolo, Naples, Italy This beautiful Baroque staircase is widely believed to be the handiwork of Neapolitan architect Ferdinando Sanfelice. While it looks like an open-faced building, the double flight of stairs was actually built in 1738 to connect multiple stories of two buildings he owned.