Chinese amphibious water bike.
Chinese inventor Li Weiguo apparently took the Treehugger article on women and bikes to heart by asking his daughter to demonstrate his amphibious bicycle that can be used on land or water. Li used empty water bottles (the large 8 gallon size used in office water coolers) as flotation for this bike, with paddles in the rear spokes providing propulsion. The bottles are removed for use on land.
More cool photos at Inhabitat and China.org.cn. Props to WIRED Gadget Blog.