THIS IS AWESOME. I'm in love with this website. Try it!!!
You select a site (i.e. location, not website :) for example, I clicked on the Sultanahmet Camii, or Blue Mosque. Then you save the file and run the program and it gives you impressive 3D views of the interiors or exteriors, depending on what point on the floor plan you clicked on. It's a bit hard to understand the website as it's all in Turkish but you can select using the floor plans and pictures, and you can then use your mouse to navigate and view the amazing architecture and art & calligraphy.
loads of fun. Try it! www.3DMekanlar.com