Would you like to see an ultra-high-definition fly-through of the International Space Station, shot with a fisheye lens? Video is 18 minutes long.
The Nottingham Cave Survey is active program that is recording all of Nottingham's 450+ sandstone caves, using a laser scanner to capture 3D details of the caves. So far, there are over 100 clips on YouTube, most of them flythroughs into the caves. Many clips are short, some clocking under a minute, while others run over 10 minutes, such as the tour of the private Peel Street Caves (Rouse's Sand Mine [PDF]).