Here’s one for the Area 51 ‘fans’ out there: a gallery of interesting satellite images taken around the Groom Lake area using Google Map. Certainly some fascinating pictures in there, feel free to suggest your own if you have some.
Beyond Google Map though, if you have a fast computer and a 3D graphics card, I recommend checking out Google Earth (free download). This program maps the whole Earth using satellite imagery, and with topographical information included, you can literally fly over any part of the world that you choose (even if it doesn’t quite map the pyramids correctly!). Jaw-dropping stuff, check it out if you have the hardware. See for example, these fly-over pics of Groom Lake, and of the fascinating eye in the triangle and Seal of Solomon which can be found around the area (pardon the pun).