Before flying over the Sahara was commonplace, some people were presistant in crossing by vehicle, here's the strangest way that worked, mobile carpet

All kinds of vehicles have crossed, or tried to cross the Sahara. This 28 Hp Peugeot of Liegeard is equipped with belts, and drove the 450 km of Biskra in Touggourt and back, and 150 km of Tebessa in Gafsa in 1908.

This one above and below seems to be a caterpillar tread endowed tractor

Found on http://steampunkvehicles.tumblr.com

Rice field tractor in India, good engineering design for the wheels

Found on http://community.livejournal.com/shushauto_ru/30360.html#cutid1

Allrides has some cool stuff you oughta see

Just the thing to keep a farmer dry when using the tractor in the rain.

There are some things that have been done with VW vans that are a surprise to me, but making a bead blaster cabinet is pretty cool and useful, the waterfall in the garden... mighty unusual

a full size 4 door Caprice snow machine is a first.

see these and all the rest at http://allride.skynetblogs.be/index-12.html

Brilliant, immediate unstoppable traction in mud, also known as good horse sense, and farmer magic

Now this, in my opinion, is effing brilliant. It really no-shit works, and like nothing else possibly could to add traction that can't be stopped.

From http://thereifixedit.failblog.org

In the end, the forest takes it all back

found on http://www.forum-auto.com/automobiles-mythiques-exception/section5/sujet225087-5775.htm