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WARNING: If you have no head for heights, then don't look down. If you seek the thrill, I dare you to look down though. :)

This is Porta Nigra in Trier, Germany, a large city gate that was built by the Roman Empire about 1850 years ago.The question is: How did I take this photo? Hint: I did not use a drone. ;-)

Hey! What do you think of this video?

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