Miraculous Staircase
The Loretto Chapel was built in the 1870's to serve the Loretto Academy, operated by the Sisters of Loretto. After the structure was completed, almost every carpenter said the balcony would need to be rebuilt or a ladder used to get up there as a conventional set of stairs would take up too much room in the chapel.
Legend has it a carpenter showed up and constructed this staircase with 33 steps and two full 360-degree turns using jst a saw, carpenter's square, a hammer and tubes in wich to soak the wood.
The staircase has no center support, nor is it held from the sides. When it was completed, the carpenter disappeared without seeking payment.