DUBLIN
I was in Dublin for St. Patrick's Day in 2000. One of the places you must visit while there is the St. Patrick's Cathedral. It dates back to 1220.
Here is a pic from the parade route along the O'Connell Bridge.
Boston
I was able to see the second largest parade in the U. S. when I visited Boston in 2006. We set up off of W. Broadway Street in South Boston to watch the parade.
New York City
In 2007, I was able to see the largest parade, in New York City. We set up across from St. Patrick's Cathedral to watch all the marchers. I also got to see Michael Bloomberg and Rudy
Guiliani.