The widest Gothic nave in the world--if that matters to you. An impressive location--huge flight of stairs to climb, though you can approach it more gradually from another direction. Don't miss Charlemagne's Throne (though it isn't). Fantastic Creation Tapestry in the cathedral museum. BTW, you can't get into the cathedral or the museum without paying, unless you come during the Festival of Flowers in May (well worth a trip to Girona!), during which the cloisters are filled with floral displays and entry is free.