On the water: Human Powered Boats
Human Powered Boats http://www.humanpoweredboats.com/
In the air: Bicycle-Powered Parachute & Human Powered Ornithcopters
http://avstop.com/Homebuilt/Para-Cycle.html Bicycle-powered parachute
Rail Bike
http://extreme.editthispage.com/
Contains links for rail biking
http://www.railbike.com/
>> Rail jumping Jumping off trains?
Rowing Bicycles
Essentially a bicycle that is propelled using your arms instead of your legs. Excellent for special needs people without the ability to use their legs, but can also be used as an means to exercise your arms, which is not available for most land vechicles. A rowing bicycle is a great alternative to push ups or exercising at a gym.
Some rowing bicycles can use both your arms and legs, giving you a
full body workout. In addition, greater power can be transferred to the
bicycle than just legs alone resulting in greater speeds. The
rowing bicycle from BC bikes is one example. http://www.bcbikes.com/
Rowing bicycles are a variety of recumbent, promising great speed and
exercise potential. A major disadvantage of a rowing bicycle may
be its safety. If all your limbs are being used for proplusion
how fast can you apply brakes.
http://www.champiot.com/ http://www.gizmo.com.au/public/News/news.asp?articleid=1610
Four-wheeled rowing machine
http://www.geocities.com/rcgilmore3/land_rowers.htm Pictures of rowing bicycles
<>Folding Bicycles