Tracking a Camera Thru 3d

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I have been thinking of ways to do an effect, whereas the camera moves thru a level, on a preset route, arriving at a final destination, (or looping).
the camera route, will go around corners, and it will also turn on its pivot, (slowly angling toward its new direction as it gets there).
i have some different ways to takcle this, but i wouldnt mind other peoples ideas on how they would do this.

someways i thought about is set a target, and point your camera pivot at it until it collides, where it then sets the target at its next location, and so on.
another way, may be to have a data field set of start points, end points, tracking speed, and camera directions.

before i go too deeply into a method, i would like to hear if anyone else may have a straightforward way. the camera will simply follow a set path, and face set directions along the way, arriving at the end.