Hi jpulido and welcome!
jpulido wrote:I can either Locate or Select a Pyramid. What is the difference? Am I restricted to one or the other?
Locate a pyramid will show you the map, with the pyramids in (approximately) their locations. If you click on a pyramid you will then see which number it is.
Select a pyramid then gives you a list in numerical order, and allows you to select one of your choice, and to then see the riddle for that pyramid.
jpulido wrote:I'm also a bit lost on the differences between a real and virtual Pyramid. If I select a real Pyramid, do I actually have to travel to the physical location, in order to win anything, if I have decrypted the riddle?
Real pyramids are hidden at the locations on the map, and the clue for them includes both the location and the password. You can use the online password checker to check the password, but even if you get it right you will still need to travel to the actual location to claim a prize.
Virtual pyramids do not exist in reality, and the riddle will just lead you to the password, which will then allow you to claim the prize. Virtual pyramids have a small 'V' on the symbol on the map.
You can change your selection of pyramid at any time (real or virtual), so there's no problem in having a look at a few different ones.
I hope that helps!