St. Peter's Basilica

There's no way to describe the enormity of that structure.  Even pictures don't convey it, you just have to go there.

Here are some pictures I took:

click to enlarge

 The view from the cupula top St. Peter's

 One of the Swiss Guards

 The bronze canopy over the altar is 7 stories high

I neither kissed nor rubbed the toe

 "You are Peter...", and those letters are 7 feet tall

To give an idea of the size, you can see the "Tu es" in the dome under the windows--and remember, those letters are 7 feet tall.  Look at the relative size of the people under the dome