If you want a hyperstereo image, then you must be sure the two images are aligned. The best way to do that is to find a long, level, straight platform of some kind to set the camera on. I have used railings of various kinds with good success. Try to keep relatively close objects out of the image. The best images are of distant objects like mountain ranges and clouds.
Cityscapes also make good subjects.
For a wide-eyed stereo image, leave them in place. This is one of my favorite stereo images.