This is an auxiliary dock inside a very large starship. In this future, faster than light travel has not yet been developed, so the ship is big enough to carry several generations of travellers, with a self sustaining ecosystem. This is to the rear of the vessel where the planetary shuttles are housed, ready for use in the distant future.
This is a frame from a video I am working on, but I thought it was a good enough composition to put up in its own right, so it is rendered at several times its normal size, (which is 720p). For this picture, I used Blender Internal with no post processing. Render time at this resolution about six minutes. Textures are all my own and created in photoshop.