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Oregon Vortex : ウィキペディア英語版 | Oregon Vortex
The Oregon Vortex is a roadside attraction located in Gold Hill, Oregon, in the United States. It consists of a number of interesting effects, which are gravity hill optical illusions, but which the attraction's proprietors propose are the result of paranormal properties of the area. It is located at . == Background == According to the locals, a gold assay office built in the area in 1904 slid from its foundation in the early teens, coming to rest at an odd angle. Odd angles seem to create an illusion of objects seemingly rolling uphill. The same effect can be seen in The Montana Vortex and house of mystery, Pennsylvania's Laurel Caverns, and at Santa Cruz, California's Mystery Spot. Oregon Vortex is also famous for "height change" as the relative height of the two people changes varying on where they stand.〔(Oregon Vortex official website. ) Retrieved December 2008.〕 Most people believe this effect happens due to a distorted background which results in a forced perspective, as with an Ames room.〔(Oregon No-Vortex ) But they rule out background with angle changes using a stick. Retrieved December 2008.〕 It also shares similar properties with the mystery spot located outside St.Ignace in the upper peninsula of Michigan.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Oregon Vortex」の詳細全文を読む
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