Hidden behind a nondescript facade is one of the world’s must-visit cathedrals. Its glittering gold interior represents the pinnacle of high Baroque architecture. The eight chapels within St. John's are dedicated to the eight branches of the Knights of Malta, while a crypt houses the tombs of several Grand Masters.
Finally, Caravaggio's 1608 masterpiece, The Beheading of Saint John the Baptist, is located in the church’s oratory. (It is, by the way, a co-cathedral as the bishop of Malta also sits at the cathedral in Mdina.)