CyArk is a non-profit which makes three-dimensional scans of archaeological sites with lasers in effort to digitally preserve them. It currently has 27 projects, including Chichén Itzá, Angkor Wat, Anasazi Pueblos in Mesa Verde, Thebes, Rapa Nui and the Royal Tombs at Kasubi. There's quite a lot of material about Cyark online, including profiles Wired Science, a lecture by founder Ben Kacyra at Google as well as an article in Archaeology and an article by two CyArk employees in Professional Surveyor describing how they work.
The Rapanui (of Easter Island), the Mayans, and the Norse colonists of Greenland all share one similarity: each culture was brought down by preventable, human-cause environmental catastrophe. Sure, Michael Crichton says it's all bunk, but Jared Diamond (the author of the infinitely discussable, Pulitzer prize winning Guns, Germs and Steel) recently came out with a new book that suggests that maybe we ought to be worried after all. Hear him discuss it on NPR's morning edition.