As always, virtual tourism posts come with our strong disclaimer that real travel is infinitely preferable to virtual travel. But not all destinations are accessible to all tourists, which is why programmers have developed tools to take you to faraway places or even back in time. The newest entrant into the virtual tourism is Croatian company Vizerra, which is developing software models of World Heritage Sites and architectural treasures.
Their site currently offers downloadable models of Macchu Picchu, Angkor Vat, the Taj Mahal, and the Tatev Monastery. They're working on more locations, with Swayambhunath Stupa, the Kiev Cave Monastery, and Prague's Old Town Square slated for the next release wave.
Here's a video what traveling to Macchu Picchu would be like, sampled directly from the software:
Getting the most out of the program will require some serious computing power. The recommended configuration includes an Intel Quad Core, a GeForce 9800GT with 512 MB onboard RAM, 2GB system RAM, and a broadband Internet connection. Still - the models look fantastic, and the software offers much, much more than just a "virtual flythrough." The things we can do these days...