You know an oil lamp lights when it has enough oil and wick to mix each other and when the wick is lit with fire. If the oil, the wick, or the lamp is not present, it cannot be lighten. When the oil and wick are ended, the lamp will not light any longer. At that point, if someone asks you to which direction the flame went to, what will be your answer? The answer one can give to that question is that the lamp light was extinguished because there was no oil or wick left to burn off. In other words, the cause for lamp to give light was no longer there. Nibbana is also something like that. Nibbana means there is no rebirth that leads for suffering when the desire is completely eliminated. That is, rebirth will not be present as a result of the absence of desire. To ask where Nibbana is, therefore, is as if someone asks where that flame went when the lamp was extinguished. Everything is created or adjusted due to their causes; when these causes are gone the object that was created will be gone too. This phenomenon was first realized and found by the greatest person who has ever lived in this universe about 2553 years ago.