Doorway to the Ukraine Pavilion in Kurgan Oblast, Moscow (as far as I can tell from an awkward translation). Photo by Murr, via Panoramio. ~I wonder if it's still around since there's a war between Ukraine and the mean ol' Russia.
Back door of St. Edward's Church, Stow-on-the-Wold - Cotswold – England, said to be the inspiration for the Moria door in J. Tolkien's Lord of the Rings. He was known to have passed through this area prior to writing the series.
30 of the most inspiring and unique entry doors i've ever seen