Extreme? Well, fine then...
The 50's retro one: (Lurve the coloured tulle!!):
"A Teddy Boy-style wedding, in the USSR, inspired by fashion of the 1950s and 60s. Photographer Anastasia Volkova said: "Misha and Masha's wedding was absolutely unforgettable, colourful and funny."
Teddy Boy? Does anyone know the translation of that? My Brit FI is asleep....
But seriously, there are some cute photos and unusual weddings in this BBC photo collection. Very large photos, warning for the bandwidth impaired...There is also a flapper one.
http://www.bbc.co.uk/news/world-13115485