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The Loretto Chapel is a chapel in Santa Fe, New Mexico, known for its unusual spiral staircase that is an exceptional work of carpentry. The construction and builder of the staircase are considered a miracle by the Sisters of Loretto and many who visit it, because it had no central support (a support was added later). The resulting staircase is an impressive work of carpentry. It ascends twenty feet, making two complete revolutions up to the choir loft without the use of nails or apparent…

Fibonacci's Dream This spiral staircase called "Wendelstein" is made of sandstone and part of Castle Hartenfels in Torgau / Saxony

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Beautiful spiral staircase at Melk Abbey, Austria

woah. reminds me of the Princess Bride.