Many years ago I had the chance to visit the Pyramid of Giza but when it was time to go inside it, I've been instantly stopped by my visualization of how I would feel in this tight and claustrophobic space (almost crouching in some places, I've been told), especially if there are many people at the same time, and you cannot easily move.. So I'm very glad to be able to finally see it with such an amazing technology, thanks!