Have you tried Google Earth with your Smart Board?
Tom Barrett has yet another presentation called Eighteen Interesting Ways to Use Google Earth in your Classroom.
Eighteen Interesting Ways to Use Google Earth in your Classroom
Google Earth provides GELessons.com - A Free Public Resource - Providing Teachers with the tools needed to enhance their instruction using Google Earth®, the free program that brings the world to the classroom! A Website By and For Teachers.
Google Earth Lessons
Also check out these ideas:
The ten best things you can do with Google Earth