We talked about church symbols in religion today, and I took the children on a field trip. We went to St. Paul's Cathedral in London, England. Oh, you're right, it wasn't a REAL field trip, just a virtual tour. The children really enjoyed the spectacular moving images and different views from each part of the massive cathedral. They noticed different details and all wanted to jump on a plane to actually tour this impressive structure. All of them begged for the link, so here it is: http://www.sphericalimages.com/stpauls/
If that doesn't work, here's the link to St. Paul's: http://www.stpauls.co.uk/ Just click on "visits and events" and then "virtual tour".
One hint: you might get dizzy. :) You've been warned! Enjoy!!!