Gaza 3D is a very cool project that recreates the Great Pyramids in 3D online to view in your web browser. It is a collaboration between the Museum of Fine Arts in Boston, Harvard University, and Dassault Systems (who make lots of great products including CATIA CAD systems).
The project is historically accurate and based on scholarly data. Documents from an expedition at the Giza pyramids were digitized and used to create the simulation.
There is a guided interactive tour on the site through 10 different areas on the Giza plateau with photos, object galleries and links to historical documents. You can zoom around the areas and click on object for more information.
This is a great resource for teachers and students studying the Great Pyramids in history or engineering classes to be able to explore them online. There is a tremendous amount of information here and it is a fun way to explore the Giza plateau.
Check it out: http://giza3d.3ds.com/#discover
Technical Note: You have to download a plugin to use it (the site will link you to it) and on Mac you will need to use Firefox in 32-bit mode. A broadband internet connection is also strongly recommended.