Yesterday I worked with a group of teachers on Google Earth, specifically, on how they can create their own placemarks that contain pictures, links, videos, or even games.
Today I came across a wonderful site, panoramas.dk, with panoramic photos from around the world. There are many from the USA including the Jefferson and Lincoln Memorials in DC, the Grand Canyon, and the Golden Gate Bridge. But there are numerous locations that I'll probably never see in person that are truly fascinating to visit virtually. It's not as good as being there, but it's the next best thing.
When creating a Google Earth placemark you could provide a link to one of these interactive photos.
Check it out at: http://www.panoramas.dk/index.html