I've posted a few articles on field trips and I know you value the experiences for your students. While there are countless examples - actual and virtual - it may be difficult for you to make excellent choices. Meris Stansbury, associate editor of eSchool News gives you a list of 10 wonderful virtual field trips that will help build useful lessons that engage students to learn more. I particularly like those that contribute to the 21st Century Skill, "global awareness." So many of our students understand the world around them but are ignorant of other lands and world issues.
Explore these virtual sites and I'm sure you'll find several that fit into your curriculum.
Ten of the best virtual field trips. Meris Stansbury, 4.7.13. eSchoolNews