I've certainly done my fair share of traveling, especially in Europe, where basically no city goes unchurched but still, his might be one of the most gorgeous churches I have ever seen.
It's not quite so spectacular from the outside - sure it looks nice, but nothing too out of the ordninary. Inside, however, is where the magic starts. After paying the entrance fee (believe me, so worth it!) you'll see one of the most beautiful churches. There's an incredible amount of detail and I just adore the blue ceiling!