Natural and man made landmarks
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Natural: Grand Canyon.
Man made: London bridge

Although this may be the opposite of what you think i will say it anyway. you were brought into this world for a reason and you still have soo much ahead of you. not everybody has an opportunity of living a great life, but it doesn’t give you a reason to end everything. somebody in the world loves you, and imagine what you would do to them if you left forever.

Answerwill have thinner; have thicker oceanic sediments;