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Photographer Jun Ahn, from Seoul, South Korea, has travelled to the top of some of the tallest buildings in her native city, New York and Hong Kong. Once she has climbed to the top of one she will find a suitable location, sit or stand dangerously close to the edge and pose for self portrait photographs.
"Vertigo" is often used (incorrectly) to describe a fear of heights, but it is more accurately a spinning sensation that occurs when one is not actually spinning. It can be triggered by looking down from a high place, or by looking straight up at a high place or tall object, but this alone does not describe vertigo. True vertigo can be triggered by almost any type of movement (e.g. standing up, sitting down, walking) or change in visual perspective (e.g. squatting down, walking up or down stairs, looking out of the window of a moving car or train). Vertigo is qualified as height vertigo when referring to dizziness triggered by heights.