Thank you Fredflinstone for creating this post. I really enjoy this topic. It gives me the opportunity to think about places we've visited and then think about what churches we've seen while visiting. We've gone to many of the churches mentioned here, including La Sagrada Famiia, the Duomo, Chapel of the Holy Cross in Sedona, and the Shrine of Sainte-Anne-de-Beaupré. We've stopped off a few times at the Old Sheldon Church Ruins in Yamassee when driving between Charleston and Hilton Head.
This is not meant to be disrespectful but I was thinking about a long weekend we spent in Philadelphia two weeks before Pope Francis arrived in September 2015. One of our highlights was a visit to the Franklin Institute, which had an exhibit on the Vatican. There we saw a to-scale replica of the Vatican and St. Peter's Square which was built by a priest from Pennsylvania. It took him almost a year to build, weighed over 100 pounds and was made up of hundreds of thousands of Legos. I was going to post photos we took while actually visiting the Vatican but I think you might enjoy this.