3D World is project which is established to create big virtual worlds with big world size and high level of detail. It includes both outdoor and indoor engine. There is no limit in camera position like in many games.
All objects are visible from all angles.
These enables to drive a car, yacht, helicopter,airplane and other vehicles. You can diving too, drive a submarine. Mountains aren't bitmaps, like in most of today games. They are real 3D objects. On each mountain You can climb or drive.