I agree with the above comments regarding Mormon temples. There are several that are quite spectacular. I don't think the one in D.C. was mentioned, but it comes to mind and is definitely worth looking up.
As a Texan, I can't imagine any list of beautiful churches omitting Mision San Antonio de Valero. I apologize for this in advance, but you just gotta "Remember the Alamo." Now a museum/visitor center/tourist attraction, etc., it is nonetheless hallowed ground. The history of the Alamo is obviously part of what makes it such a powerful image, but it is a striking building.
As a side note, the Alamo is part of the San Antonio Missions National Historic Park. At least a couple of the missions are active parishes. I attended mass with a Catholic family member, at Mission San Jose if I remember correctly, and it was really cool.
As a Texan, I can't imagine any list of beautiful churches omitting Mision San Antonio de Valero. I apologize for this in advance, but you just gotta "Remember the Alamo." Now a museum/visitor center/tourist attraction, etc., it is nonetheless hallowed ground. The history of the Alamo is obviously part of what makes it such a powerful image, but it is a striking building.
As a side note, the Alamo is part of the San Antonio Missions National Historic Park. At least a couple of the missions are active parishes. I attended mass with a Catholic family member, at Mission San Jose if I remember correctly, and it was really cool.