I take it you learned how to control the camera? If not, check out the wiki, for instance at:
http://geck.gamesas.com/index.php/gamesas_Tutorial_Layout#Using_the_3D_Camera
Here is the key parts:
To
Zoom, either use the "Scroll Wheel" on your mouse or hold "V" and move your mouse forward or backwards. "V" is a smooth zoom, useful for precise motions, while scrolling is practical for regular use.
To
Rotate the Camera, hold down "Shift" and move your mouse. This will rotate your view around the currently selected object. If nothing is selected it will turn the camera in place.
To
Pan the Camera up, down, left, or right, hold either the "Space Bar" or click & hold the "Middle Mouse Button", moving your mouse to pan.
To turn the bright lighting on so you can see better, click the icon of the lightbulb on the toolbar (you can also press 'A' if the render window is active).
Besides that, you might be in a certain spot of the cell looking at something. You can try maneuvering the camera around to see. If not, you might also look at the the list of items in the current cell. I think by default it is on the bottom right area, next to the list of cells/rooms. Double-clicking an item in the list will jump the camera to it.
If you managed to take the camera away from the cell you were in, you can either scroll around looking for it, or simply find it again in the list of cells and double-click it to jump the render window to it.
Not sure if that is exactly what you needed, but hopefully it helps. Good luck!