Google Cardboard is great, but could use slight improvements.

My Take

This app is paired with the google cardboard glasses ($10) and for what its worth, it is fantastic! The real VR machines may give the students a more clear and authentic experience, but you can't beat a $10 pair of glasses and a free app to give students a virtual tour of historical sites. The images were slightly blurry and may give students a headache if used too often.