Recently listed as a World Heritage site, each step of the staircase is beautifully tiled with a different motif. A must-see for sure.
Wikipedia (Italian) https://it.wikipedia.org/wiki/Scalinata_di_Santa_Maria_del_Monte
Address Scala Santa Maria del Monte, 95041 Caltagirone, Italy
Coordinates 37°14'19.748" N 14°30'43.686" E