This is Old Havana's classic cathedral. The plaza fronting the cathedral and the church's baroque facade, with its asymmetrical towers, are the most visited attractions in La Habana Vieja. Inside, the cathedral is simple, almost to the point of austerity, thanks to a radical, 19th-century neoclassical makeover. Still, the vaulted ceilings, massive stone pillars, and modest collection of art and antiquities certainly make it worth a visit. Of these, the 17th-century wooden sculpture of Saint Christopher is interesting -- note the shortened legs, which were cut in order to get the piece into place. Despite the official visiting hours listed, the church is frequently closed tight. If you're lucky, you might be able to attend Mass here at 9am on Sunday.