Technically speaking, a yurt is merely a circular tipi constructed of latice work and skins originating with the nomads of central asia. It is not a wagon and normally not on wheels. The picture Taryn has produced is a one of a kind yurt on wheels, like the chariot yurts of china.
The Ubar's wagon:
"The wagon itself was the largest in camp, and the largest wagon I had conceived possible; actually it was a vast platform, set on
numerous wheeled frames; though at the edges of the platform,
on each side, there were a dozen of the large wheels such as are found on the much smaller wagons; these latter wheels turned as the wagon moved and supported weight, but could not themselves have supported the entire weight of that fantastic,
wheeled palace of hide. The hides that formed the
dome were of a thousand colors, and the smoke hole at the top must have stood
more than a hundred feet from the flooring of that vast platform. I could well conjecture the riches, the loot and the furnishings that would dazzle the interior of such a magnificent dwelling."—Nomads, 41
Read that carefully...
http://www.thebarkers1.com/images/World's%20Largest/Lg%20Covered%20Wagon.jpgThis is a fake but imagine the size....and this is small
http://www.tsereteli.ru/files/objects/1618/1618.jpgThis is nearly 100 feet tall
Puts things in perspective doesnt it?
Raz