The Loretto Chapel, in Santa Fe,
New Mexico, is a former Roman
Catholic church that is now used as a museum and wedding
It was built between 1873 and 1878.
It is known for its unusual helix
shaped spiral staircase (the "Miraculous Stair"). The
staircase has two 360 degree turns and no visible means of support.
Also, it is said that the staircase was built without
nails—only wooden pegs. The
stairs are now considered too unsafe for regular use.
For more information, refer to the Loretto Chapel website.