Two words -- Virtual Reality.
Virtual reality is (according to MerriamWebster.com):
an artificial world that consists of images and sounds created by a computer and that is affected by the actions of a person who is experiencing it
It's like experiencing a new world without having to leave your chair, feeling like you're in that location.
My son told me that this is a huge up-and-coming field. Why? Because of Google's new virtual reality products. The main one I found are Google Goggles.
From what I see, these products will move around an area by tracking eye movements. It's an amazing idea.
Here are some free products on Google Play to be installed on phones and/or ereaders (some work,some don't). You'll need to get Google Cardboard or something compatible to make the rest work correctly. Otherwise, you'll just have a split screen of the images, kind of like those 3-D glasses (for depth perception). It also requires something called Gyroscope, so using it on my Nook won't work.
Some places to visit:
Village for Google Cardboard
Cardboard VR 3D Environment
Very cool stuff! Check it out! It's like having a View-master that actually makes you feel like you're there. Cheaper and safer than a vacation. LOL!
Have a great week!