The Virtusphere is a 10 foot hollow sphere that serves as a "locomotion simulation" platform. Pair it with a head-mounted display and a 3D environment, and users can walk or even run around freely in different virtual worlds -- a first-person shooter map, architecture/construction sites, famous locations, museums, and more. (Vice Broadcasting System), which put together the entertaining documentary about Twin Galaxies's Walter Day, published this informative piece interviewing the company behind the Virtusphere and demonstrating its Holodeck-esque experience.

One great thing about the sphere is that when you're tired of its virtual applications, you can push it off its platform, jump in, and pretend you're in that American Gladiators event.